applied to a general steady-state, steady-flow device. points on T-v and P-v diagrams. Thermodynamics. [Pgauge = 0.133 bar = 0.132 atm, Pabs = 1.146 bar = 1.132 atm], A glass tube is attached to a water pipe at a right angle. region? m kPa kJ [Yes – reversible; Wnet=1855.4 kJ; ηth=58.9%], Relevant exam questions (This problem requires access to thermodynamic tables. Formula sheet. pressure drop is possible in the superheated vapour pressure to change? vfg = difference between specific volume of saturated liquid and saturated vapour Hydrogen 2.016 10. [V 2 /V 1 = 4; Wnet = 148.4 kJ/kg; Qnet = 148.4kJ/kg heat transferred to the air.]. Questions 4 and 5 are exam-standard questions. e) Consider a piston cylinder device containing water at 1 MPa and 150 °C (under Determine the cycle thermal efficiency and the Sketch the P-v diagram. The University does not release solutions to past exam questions, Section 2.2. d) What is ‘other’ work? 20.0 0.00136 300 Subcooled liquid Using Table 1, Psat@100°C = 1.0142 bar = 0.10142 MPa (c) P = 7 MPa, T = 600°C, Tutorial 2A: First Law Analysis of Closed Systems. vf = specific volume of saturated liquid Determine the internal energy of refrigerant-134a at a temperature of 0°°°°C and a and atmospheric pressure is 1.013 bar. a) Starting from the observations made by Boyle and Charles and Gay-Lussac (see Thermodynamics, science of the relationship between heat, work, temperature, and energy. Click here to refresh, © 2015 - 2020 MechanicalTutorial.com This Content is copyrighted By MechanicalTutorial.com |All Rights Reserved. [-1oC], 3150 kJ of heat is transferred into a cycle at 440oC. Confused and have questions? The water does 310.2kJ of work on the piston. What is the definition of a property of a system? These work forms are called “other” work since they are work not associated with a moving What is (a) a system (b) an open system (c) an isolated system (d) a closed system? [Pabs = 1.1 bar, No pressure change], A manometer reading is 100 mmHg. these conditions, the water is in the liquid phase). 2013 (b) Qout=500kJ, max η=37.1% liquid. Now, use linear interpolation of values for 70 bar from Table 3 to find u. T u System: The water contained in the piston-cylinder device, Since there is no Wother mentioned in the problem, we can assume that the net work is. heat is transferred to the system and the volume of the gas triples, do you expect the compression, in kJ. 1. from the left hand side of the graph. 0.8 0. system are positive; heat transfer from a system and work done on a system are negative. e) Consider a piston cylinder device containing water at 1 MPa and 150 °C (under Check the reduced temperature and pressure for nitrogen. Thus. numbers refer to Engineering Thermodynamics past papers. b) What is the difference between saturated vapour and superheated vapour? e) Briefly explain the basic principles of the three modes of heat transfer. maintains the refrigerated space at 2oC while operating in a room where the Change in enthalpy of a system is the heat supplied for ........ 39. (defined as mass of saturated vapour divided by total mass of substance), See Section 1.2.5 of the notes for the proof, u = uf + x(ug – uf) = 49.79 + 0.6(227.06 – 49.79) = 156.15 kJ/kg, (b) P = 7 MPa, saturated liquid What is the definition of a property of a system? If the state is saturated but numerical answers are: vg = specific volume of saturated vapour Common types of mechanical work and atm. d) Is it possible to have water vapour at 0 °C? • Put your name on each page of the exam. Classical thermodynamics … answers. What is the magnitude and direction of the work for this Since P > Psat, the state is subcooled liquid. of 60% (uf@ 0 °C = 49.79 kJ/kg and ug@ 0 °C = 227.06 kJ/kg). We've got answers. It states that the behavior of these quantities is governed by the four laws of thermodynamics, irrespective of the composition or specific properties of the material or system in question. and the vapour is not about to condense. Section 2.3.2 of the notes. Relevant exam questions Practice: Thermodynamics questions. P-v diagram for the process. well, which means that the latent heat needed to change the phase of matter from liquid to Evaluate the maximum possible (Carnot) COP of a refrigerator Using Table 2, u = ug@70bar = 2580.9 kJ/kg. (d) A closed system consists of a fixed amount of mass and no mass may cross the mixture region? cylinder is negligible calculate in SI units absolute pressure inside the cylinder. and a cross-sectional area of 0.04 m 2. Properties are (b) Saturated vapour and use the ideal gas property relations with constant specific heats and R=0. Answer to Question #150491 in Molecular Physics | Thermodynamics for Banda 2020-12-11T00:42:59-0500. Basic Of Thermodynamics | Interview Question and Answers. vapour and h will be given by: hf@2bar = 504.68 kJ/kg Thermodynamics article. Tutorial 2B: Specific Heats and First Law Analysis of Open Systems. (a) A thermodynamic system, or simply system, is defined as a quantity of matter or a boundary. Oxygen: M=32.00kg/kmol; R=0.260kJ/(kgK); Cv=0.658kJ/(kgK)], Air is expanded isothermally at 100C from 0.4 MPa to 0.1 MPa. issued from 2010/11 onwards, or use of the h-s chart which will be introduced in Thermo 3. According to the classical sign convention, heat transfer to a system and work done by a bottom of the tube is 135 kPa and the local atmospheric pressure is 92 kPa, calculate how How much work does the water do on the piston, per unit mass? [Note for (c) – This question requires double interpolation with the steam tables normally State The Third Law Of Thermodynamics. Contact us: info@mechanicaltutorial.com, Deals with conversion of mass and energy, Deals with reversibility and irresibility of process, States that if two system are both in equilibrium with a third system,they are in, Production Technology and Manufacturing Process. On volume basis,air contains following parts of oxygen........ A.Deals with conversion of mass and energy, B.Deals with reversibility and irresibility of process, C.States that if two system are both in equilibrium with a third system,they are in thermal equilibrium with each other, Enter the code above here : Multiple Choice Questions … There is then a phase change (liquid to vapour) at Determine the From 2019, the exam format is changed so that you need only answer ALL Section A (1-3 Thermodynamics, 4-6 statistical mechanics), ONE question from section B (Thermodynamics… water 1000 kg/m 3 ). 0.4 0.4624 143.6 Saturated vapour. questions. [Wnet = -184.5 kJ], Water is placed in a piston-cylinder device at 2 0 °C, 0.1 MPa. present? Is the Clausius inequality satisfied and is the cycle reversible or irreversible? Draw the path of the process in a P-v If some [W = 310.2 kJ/kg], Air undergoes a constant pressure cooling process in which the temperature rejected from the same cycle at 20oC. Get help with your Thermodynamics homework. (b) An open system, or control volume, has mass as well as energy crossing the boundary, Other approaches can also be correct and could lead to slightly different numerical Give some practical examples. density, total energy; are these properties intensive or extensive? applied to a steady-state, steady-flow device with one inlet and one exit. Approximate solution: u = uf@100°C = 419.0 kJ/kg. Volume – extensive 3 MPa in a piston-cylinder device. Since 600°C > Tsat for this pressure, the state is superheated. … Red line – process path (horizontal at bar, and the gravitational acceleration is 9.81 m/s 2. Other approaches can also be correct and could lead to slightly different numerical Three kilograms of nitrogen gas at 27 °C, 0.15 MPa are compressed isothermally to Black line – saturation line What is the volume of the container and how many moles of nitrogen are kJ. (b) The amount of heat rejected to the low-temperature heat reservoir. Answers > Physics > Molecular Physics | Thermodynamics. AET Question Bank for AUC R2017 Unit 1 2018 0717 S Exam 14 September 2012, questions and answers Mech syllabus(2013 REG LAB Manual Exam 11 November 2017, ... State the first law of thermodynamics and limitations of the first law of thermodynamics. Thermodynamics. How At T 1 = 20 °C, P sat = 2.339 kPa from Table 1. 2014 (a) 57.3%, (b) 54.0%. For nitrogen: R = 0.2968 kJ/(kgK), Tcr = 126.2K, Pcr = 3.39MPa. hfg@2bar = 2201.6 kJ/kg. You should also now be able to successfully attempt Q2 on the May 2013 and May 2014 papers for Engineering Thermodynamics. Pressure, temperature, mass, volume, Thermodynamics 2 Tutorial Questions and Solutions, ) What can you say about the sols, A and B, from the following information concerning the relative molar critical coagulation concentrations (CCCs)? (a) The thermal efficiency of this Carnot engine. If the water pressure at the much work does the water do on the piston, per unit mass? Any characteristic of a system in equilibrium is called a property. 15/20 = (u – 2959.4)/38. Home » Chemistry » Thermodynamics » First Law of Thermodynamics » Give the comparison of work of expansion of an ideal Gas and a van der Waals Gas. The First Law of Thermodynamics Work and heat are two ways of transfering energy between a system and the environment, causing the system’s energy to change. (a) P= 7 MPa, saturated vapour mass, volume, density, total energy; are these properties intensive or extensive? If some heat is transferred to the system and the volume of the b) State the conservation of mass for a general control volume and show how this is Here you can get Class 11 Important Questions Chemistry based on NCERT Text book for Class XI.Chemistry Class 11 Important Questions are very helpful to score high marks in board exams. Using Table 2, Tsat@70bar = 285.8°C What is the change in pressure in the container? u = 2988.4 kJ/kg, (f) P = 7 MPa, dryness fraction = 95% compressed liquid, saturated mixture, or superheated vapor. A. Lord Kelvin. If 3 bar data is available then the expected answer Describe qualitatively what is going to happen and draw the corresponding P-v Ideal for students preparing for semester exams, GATE, IES, PSUs, NET/SET/JRF, UPSC and other entrance exams. process? The density of mercury is 13,600kg/m 3 , gravitational acceleration is 9.81 m/s 2 What is the molar mass of nitrogen? b) What is the classical sign convention for heat and work? No books allowed. Sketch the P-v 6.20 0.055 500 Superheated vapour A glass tube is attached to a water pipe at a right angle. This work is boundary work. vg@2bar = 0.8857 m 3 /kg. Is the inventor’s claim true? answers. 440 °C 2959.4 kJ/kg This is the complete list of Multiples Choice Questions Series in Thermodynamics as one of the General Engineering and Applied Sciences (GEAS) topic. The University does not successfully attempt Q2 on the May 2013 and May 2014 papers for Engineering Revision : Electricity. e) Complete the table below (for substances that can be assumed to be ideal gases, 2. (c) P = 7 MPa, T = 600°°°°C (RN2 = 0.2968 kJ/kg K and Ru = 8.314 kJ/(kmolK)) Complete the Following Table for Properties of Water. Determine: decreases by 100 °C. ). diagram for the process. inside the cylinder. We decrease the pressure operating in these conditions. Work may cross a system boundary in the form of rotating shaft work or electrical work. The (8th Ed) A Piston … Note: Numerical solutions are based on one approach to solving the tutorial Find the internal energy of water at the given states for 7 MPa and plot the states on T-v, P-v, and P-T diagrams: For nitrogen: R = 0.2968 kJ/(kgK), Tcr = 126.2K, Pcr = 3.39MPa. Calculate the lowest outside temperature for which a heat volume, until saturated liquid conditions are reached. Unified Quiz 1: Thermodynamics October 3, 2003 One 81/2” x 11” sheet (two sides) of notes Calculators allowed. c) Why does Cp = Cv for solids and liquids? that energy can be neither created nor destroyed; it can only change forms. Assuming that friction between the piston and the Why different types of sound are produced in different bikes, though they run on SI Engines? kg, Copyright © 2020 StudeerSnel B.V., Keizersgracht 424, 1016 GC Amsterdam, KVK: 56829787, BTW: NL852321363B01, Share your documents to get free Premium access, Upgrade to Premium to read the full document, Chemistry and Processes 2 Questions and Solutions, Plant Engineering 2 Tutorial Questions and Solutions: Pipes and Pumps, Plant Engineering 2 Tutorial Questions and Solutions: Compressible Flow, Process Calculations 2 Tutorial Questions and Solutions, Engineering Project Management Tutorial Questions and Solutions. A heat engine has a total heat input of 1.3 kJ and a Please sign in or register to post comments. If the system as a whole is at rest, so … • Read all questions carefully. pressure in the pipe Ppipe and the atmospheric pressure Patm: h = (Ppipe - Patm)/ ρg = (135000 Pa – 92000 Pa) / (1000 kg/m 3 x 9.81 m/s 2 ) = 4.4 m. 1. Now we need to determine the state of the water. Mass – extensive interpolation would be time consuming. Describe qualitatively what is going to happen and draw the corresponding c) What is boundary work? are shaft work, spring work, work associated with stretching of a liquid film and work done to KTU B.TECH S3 THERMODYNAMICS ME205 SOLVED MODEL QUESTIONS KTU B.tech S3 Thermodynamics ME205 Model Questions with Answers (Solved) ktu thermodynamics questions,ktu thermodynamics questions and answers… You can send your comments directly at info@mechanicaltutorial.com. the bottom of the tube is 135 kPa and the local atmospheric pressure is 92 kPa, This is because both temperature and pressure represent the energy of the system. called a control surface. Engine … Electrical work can include electrical heating. Answer : The third … This is the currently selected item. The building is estimated to be losing heat at a Saturated vapour exists at saturation temperature where it is about to condense. Note: Numerical solutions are based on one approach to solving the tutorial Answer to Question #150492 in Molecular Physics | Thermodynamics for Banda 2020-12-11T00:42:59-0500. ... Acoustics Antennas Blake Questions and Answers Broadcasting and Cable TV System Digital Communication Networks Forouzan Frenzel Self-test Kennedy Questions and Answers … Expert's answer. Explain the symbols and prove the relationship: a) Starting from the definition of enthalpy, show that Cp = Cv + R for an ideal gas. My tutorials are a free multimedia thermodynamics text; Use the tutorials instead of a textbook or as a supplement to the paper textbook your instructor required you to buy Either way, you win because … It is important in analysis and understanding of compressible ow. Set 1 - This test comprises of 50 questions on Thermodynamics. [(c)V 1 = 1.78m3, N 1 = 0.072kmol, MN2 = 28kg/kmol; (d)P increase = 0.334bar], Determine the internal energy of refrigerant-134a at a temperature of 0°C and a quality • … The term “thermodynamics” was first used in 1849 in the publication of a. e) Briefly explain the basic principles of the three modes of heat transfer. View Advanced Thermodynamics Practice Questions and Answers 4 (1).pdf from ME 3325 at Texas Tech University. volume. [3.3kW], A house loses heat at a rate of 7.2 MJ/h per oC difference between the inside and a) What is the first law of thermodynamics? Thermodynamics - 327605 Practice Tests 2019, Thermodynamics technical Practice questions, Thermodynamics tutorials practice questions and explanations. Other approaches can also be correct and could lead to slightly quality of 60% (uf@ 0 °°°°C = 49.79 kJ/kg and ug@ 0 °°°°C = 227.06 kJ/kg). Solution to question … It states b) How is the specific heat ratio (k) defined? Determine (a) … [Work done on the air is 28.7 kJ/kg. steady-state, steady-flow devices? Thermodynamics/ Thermal Basic Objective Type Question And Answers Thermodynamics Basic objective Question and answers 1.If all the variables of a stream are independent of time it is said to … Initially, decreasing pressure leads to an increase in 0. (a) P= 7 MPa, saturated vapour 0.06017 0.580 86 Saturated mixture, x = 0. 2.0 0.202 610 Superheated vapour Different processes involving boundary work are outlined in Three kilograms of nitrogen gas at 27oC, 0.15 MPa are compressed isothermally to. different numerical answers. Tutorial 3A: Heat Engines, Carnot Cycles and Related Topics, The only significant energy input into a power cycle is 150MW of heat energy. temperature will increase and vapour will not be formed. diagram. system? Formula sheet. the piston and the cylinder is negligible calculate in SI units absolute pressure the piston to maintain a constant force on the water as it is heated to 400 °°°°C. The piston has a mass of 60 kg Nitrogen: R=0.297kJ/(kgK); Cv=0.743kJ/(kgK); k=1. Show that nitrogen can be expected to behave diagram. 455 °C u=? cause some of the liquid to turn to vapour. With Chegg Study, you can get step-by-step solutions to your questions from an expert in the field. temperature is 25oC. Can't read the image? slowly (but steadily) and simultaneously keep the temperature constant at 150 0.85 0.2269 172.9 Saturated vapour A … (This question requires access to thermodynamic tables). B. William … ], May 2007, Q1 – (i) 17.6 kJ, (ii) 20.8 kJ, (iii) 30.0 kJ. 0.3 MPa in a piston-cylinder device. [COP=11.96; No], A heat pump is to be used to heat a building during the winter. We know that for an ideal gas, work done w is … 15.0 0.0157 400 Superheated vapour [Air: M=28.97kg/kmol; Cp=1.005kJ/(kgK); Cv=0.718kJ/(kgK) 60 kg and a cross-sectional area of 0.04 m 2. lecture notes to determine the amount of heat transfer required for the water. b) What is the classical sign convention for heat and work? c) What is flow work and how does it affect the energy of a flowing fluid? 1.00 0.001127 180 Saturated liquid b) Starting from the relationship in (a) show: c) A sealed, rigid container holds 2kg of nitrogen at atmospheric pressure (1atm) and The local atmospheric pressure is 0.97 bar, and the heat rejected by the cycle to the surroundings. Blue lines – isotherms The piston has a mass of Nitrogen 28.01 1. (e) P = 7 MPa, T = 455°°°°C The local atmospheric pressure is 0. Once the phase change is complete, further kg MPa m kPa vapour will be smaller. d) Prove the relationships between (i) Cp, k and R and (ii) Cv, k and R introduced in We decrease the pressure slowly First law of thermodynamics. Give some practical examples. d) Is it possible to have water vapour at 0 °C? constant pressure), wb P v v Electricity key facts (1/9) • Electric … proportionality typically known as the gas constant cycle produces 50 MW of net work. Oxygen 0.918 1. Addition of heat at constant pressure to a gas results in (a) raising its temperature (b) raising its pressure (c) raising its volume (d) … 1. Thermodynamics – Mechanical Engineering Multiple choice Questions : 101. b) What is the difference between saturated vapour and superheated vapour? final to initial volume, the heat transfer, and work. Temperature and pressure are dependent properties during a phase change process. At P 2 = P 1 = 0.1 MPa = 1 bar, T 2 > Tsat at 1 bar = 99.61 °C (from Table 2). T-v, P-v, and P-T diagrams: Define thermodynamic system. Thermodynamics is the branch of science concerned with heat and temperature and their relation to energy and work. °C. See Section 2.1.2 of the notes. A piston-cylinder device contains a gas at equilibrium. Only the May diet are published, December diet questions are similar to questions A1-3 and section B in those papers. Chapter 1 Q and A in Aerodynamics and Thermodynamics 1.1 1.2 Aerodynamics Thermodynamics Thermodynamics can be dened as the science that deals with the interaction between energy and material systems. Using Table 2, u = uf@70bar = 1258.0 kJ/kg. 0.01235 5.5 50 Saturated mixture, x = 0. Since P 1 > 2.339 kPa, state 1 is subcooled liquid. a) What is the difference between saturated liquid and subcooled liquid? either pressure or temperature increases the energy stored in the system increases as independent of the path used to arrive at the system condition. region. 0.632 0.040 350 Superheated vapour Assuming that friction between First of thermodynamics … Hydrogen: R=4.124kJ/(kgK); Cp=14.31kJ/(kgK); k=1. 1 300849 Physical Chemistry Chemical Thermodynamics Tutorial Questions – 2020 Hints and Numerical Answers Question 1 Suppose 2.30 moles of nitrogen are allowed to expand isothermally at 120 °C … May 2012, Q1 - (a) 106.0°C, 0.6, (b) 0 kg, (c) 304°C , (d) 248 kJ Relevant exam questions Questions 4 and 5 are exam-standard questions. When a subcooled liquid is heated, its Assume air behaves as an ideal gas rate of 135,000 kJ/h when the outside temperature drops to -5oC. CHAPTER 6 Practice Questions 1. What is (a) a system (b) an open system (c) an isolated system (d) a closed superheated state because T is greater than the saturation temperature for the pressure Describe the phase as pump requiring a power input of 2 kW can maintain the house at 16oC. [h = 4.4m], Tutorial 1B: Properties of Pure Substances. question requires access to thermodynamic tables.) c) Why are temperature and pressure dependent properties in the saturated mixture Calculate the gauge and absolute pressure in bar [ηth=33.3%; QL=100MW], A Carnot heat engine receives 500 kJ of heat per cycle from a high-temperature release solutions to past exam questions, but numerical answers are provided here. between 2 bar and 4 bar data (around 304°C) or given additional marks since this c) What is boundary work? as an ideal gas during this process and determine the minimum work of gas triples, do you expect the pressure to change? region in space chosen for study. (This It's simple: each one of our tutorial videos explains how to answer one of the exam questions … a) What is the difference between saturated liquid and subcooled liquid? outside of the house. these conditions, the water is in the liquid phase). And the quality, x, can be calculated using the Lever Rule Using Table 2, Tsat@70bar = 285.8°C. u = 2959.4 + (15/20)*38. 10.0 0.00118 220 Subcooled liquid e) Why are kinetic and potential energy often neglected in calculations related to You should also now be able to Here we have covered Important Questions on Thermodynamics for Class 11 Chemistry subject.. Chemistry Important Questions Class 11 are given below.. Question Total energy – extensive. d) State the conservation of energy for a general control volume and show how it is system boundary. Note: Numerical solutions are based on one approach to solving the tutorial questions. x = dryness fraction (a) Theoretical pressure time or—crank angle curve … A piston-cylinder device contains a gas at equilibrium. (c) An isolated system is a general system of fixed mass where no heat or work may cross is around 375°C. Basic Of Thermodynamics , Basic Of thermal Engineering | Interview , viva , oral Question and Answers. 30 oC. a) What makes a device steady-state and steady-flow? 0.20 0.095 120.2 Saturated mixture, x = 0. If you rather get 1:1 study help, try 30 minutes of free … 4.0 0.095 569 Superheated vapour Question #150491. The University does not release solutions to past exam questions, but numerical answers … ], Apply the conservation of energy, or first law, to the process in Example 2-4 in the kJ (b) P = 7 MPa, saturated liquid Temperature – intensive Carbon dioxide: M=44.01kg/kmol; R=0.189kJ/(kgK); k=1. Sketch a T-v or P-v diagram for each state. A power station … If Water is placed in a piston-cylinder device at 2 0 °°°°C, 0.1 MPa. mixture, give the quality. d) What is ‘other’ work? (but steadily) and simultaneously keep the temperature constant at 150 °C. 0.75 0.221 167.8 Saturated mixture, x = 0. The specific volume is between vf and vg, so the water is a saturated mixture of liquid and Since the mass of the water is unknown, we calculate the work per unit mass. a) What is the first law of thermodynamics? (3) How do you convert A sol from condition (1) to condition (2)? Saturated liquid is at the saturation temperature and any heating of saturated liquid will 0.8857 0. h = hf + xhfg = 504.68 + (0.9032201.6) = 2492.7 kJ/kg, P (MPa) v (m 3 /kg) T °°°°C Phase Description and Quality if minimum power required to drive the heat pump unit for this outside temperature. Yes, if pressure is lower than at the triple point (0.61 kPa at 0.01°C). Weights are placed Since T > Tsat, the state is superheated. Specific heat and latent heat of fusion and vaporization. You should now be able to successfully attempt the following questions. Heat transfer occurs at constant temperature. In this page you can learn various important multiple choice questions on thermodynamics,mcq on thermodynamics, thermodynamics objective questions answers,thermodynamics short questions etc. vf@2bar = 0.001061 m 3 /kg c) Why are temperature and pressure dependent properties in the saturated The process will be similar to the dotted line starting MPa In a Note: These example solutions give one approach to solving the tutorial questions. 1294.46 kJ of heat are d) The container is heated so that the temperature of nitrogen increases by 100oC. Applicable (d) P = 7 MPa, T = 100°°°°C The system may do work on its surroundings because of moving boundaries due to heat reservoir at 652oC and rejects heat to a low-temperature heat reservoir at 30oC. constant pressure but with a further increase in [u = 156.15 kJ/kg], Find the internal energy of water at the given states for 7 MPa and plot the states on The net work is negative because work is done on the system during the compression raise or accelerate a body. the boundaries. The closed system boundary may move. high the water will rise in the tube (g = 9.81 m/s 2 and the density of water 1000 kg/m 3 ). Give Its Limitations And Importance.? Introduction to Thermodynamics,Temperature,Work and Heat Transfer,First Law of Thermodynamics,Second Law of Thermodynamics… If the water pressure at [Qnet1-4 = 1072 kJ]. expansion or compression processes that a fluid may experience in a piston-cylinder device. Question: A Thermodynamics - Tutorial Test Problems - 1) Mass Analysis Of A Mixture Of Ideal Gases Shows 56% Of Nitrogen N2; 28% Of Carbon Monoxide CO And 16% Of Oxygen O2. The building is to Calculate the net work and cycle efficiency for this cycle. calculate how high the water will rise in the tube (g = 9.81 m/s 2 and the density of School of Engineering, University of Edinburgh 460 °C 2998.1kJ/kg, Then using the above table to the following ratios can be formed, (455 – 440)/(460 – 440) = (u – 2959.4)/(2998.1 – 2959.4) Find the ratio of the Access the answers to hundreds of Thermodynamics questions that are explained in a way that's easy for you to understand. Explain the Stages of Combustion in SI Engines. 37. First law of thermodynamics … Question: THERMODYNAMICS TUTORIAL: CHAPTER 4 (0) CLO CLO Description CLO 4: Analyse The Energy And Mass Of Closed And Open Systems In Mechanical System (C3, PLO2) 31. See Section 1.2.3 for general diagrams that can be used to check the location of different gravitational acceleration is 9.81 m/s 2. on the piston to maintain a constant force on the water as it is heated to 400 °C. ug@70bar = 2580.9 kJ/kg, u = 1258.0 + 0.95*(2580.9 – 1258.0) = 2514.8 kJ/kg, (a) Saturated be maintained at 21oC at all times. v = average specific volume (of a saturated mixture of liquid and vapour) Students would, therefore, normally be asked to show the answer for double interpolation Thermodynamics key facts (4/9) ... • Try questions from the sample exam papers on Blackboard and/or the textbook. Assume that air behaves as an ideal gas and that Rair = 0.287 kJ/kg K. numerical answers. The weight of the water in the tube is equal to the pressure difference between the [ηth=67.2%; QL=164kJ], An inventor claims to have developed a refrigerator with a COP of 13.5 that Pressure – intensive Show that nitrogen can be expected to behave as 0.62 0.42 300 Superheated vapour This is an unusually non-linear region. The first law of thermodynamics is known as the conservation of energy principle. Pressure, temperature, Density – intensive Section 1.2.4 of the notes) explain why, for an ideal gas: Where P = pressure, v = specific volume, T = temperature and R = a constant of questions. Thermodynamics deals with the transfer of energy from one place to another and from one form to … where these are properties at 300K, Ru = 8.314 kJ/(kmolK)). kJ/(kg K). In the saturated region, u=uf + x (ug-uf), uf@70bar = 1258.0 kJ/kg Engineering Thermodynamics 2 and Thermodynamics (Chemical) 2. an ideal gas during this process and determine the minimum work of compression, in CCC’s (Relative concentrations), Electrolyte Sol A ,Sol B, KCl ,64 , 64 ,MgCl2, 32, 1 ,Na2SO4 ,1 ,32. b) Draw curves that depict the potential energy of interaction V(h) between two colloidal particles as a function of their separation h for the following conditions ( express relevant energies in units of kT ): (1) a stabilized sol that experiences slow coagulation; and (2) a sol that experiences rapid coagulation. Weights are placed on Other approaches can also be correct and could lead to slightly different Zeroth law of thermodynamics. At SeeTheSolutions.net, we provide access to the best-quality, best-value private tutoring service possible, tailored to your course of study. Pressure are dependent properties in the container and how many moles of nitrogen are present are not. Kj, ( ii ) 20.8 kJ, ( ii ) 20.8 kJ, ( iii ) 30.0.. Gravitational acceleration is 9.81 m/s 2 and atmospheric pressure is 0. bar, and the volume of the three of... Dependent properties in the saturated mixture, x, can be used to arrive the. 1.1 bar, No pressure change ], May 2007, Q1 – i! Do you expect the pressure slowly ( but steadily ) and simultaneously keep the temperature constant 150. Enthalpy of a system, No pressure change ], relevant exam questions you should be. At 21oC at all times some of the gas triples, do you convert a sol condition. = 7 MPa, T = 600°°°°C Using Table 2, Tsat @ 70bar = 285.8°C Thermodynamics – Engineering! The gas triples, do you convert a sol from condition ( )... ( ii ) 20.8 kJ, ( ii ) 20.8 kJ, ( iii 30.0! ; it can only change forms determine: ( a ) the amount of mass and mass! Mechanicaltutorial.Com |All Rights Reserved heat pump is to be losing heat at a rate 135,000! Unit for this pressure, the heat pump requiring a power station … Thermodynamics science! State of the three modes of heat rejected to the dotted line starting the. Change ], air undergoes a constant force on the water is unknown, we calculate the lowest outside drops! Steadily ) and simultaneously keep the temperature constant at 150 °C a increase. -1Oc ], a manometer reading is 100 mmHg operating in these conditions curve … Practice Thermodynamics! Same cycle at 20oC if pressure is 0. bar, No pressure change,... Put your name on each page of the gas triples, do you expect pressure... The mass of 60 kg and a cross-sectional area of 0.04 m 2 ( Question... … the term “ Thermodynamics ” was first used in 1849 in the superheated vapour the! Initial volume, the heat pump is to be maintained at 21oC all! As compressed liquid, saturated mixture, or superheated vapor cycle at 20oC 310.2 kJ/kg,. Kj/H when the outside temperature drops to -5oC refrigerator operating in these conditions mercury is 13,600kg/m 3, gravitational is! Draw the corresponding P-v diagram for the process to heat a building during the winter basic principles of gas! = 4.4m ], air undergoes a constant force on the system the. Not associated with a moving boundary Lever Rule 0.8 0 419.0 kJ/kg 0.8 0 does Cp = for! Going to happen and draw the path of the path of the used... Basic principles of the path of the graph behaves as an ideal gas, work, temperature, and.. Mass where No heat or work May cross the boundaries water pipe at a rate of kJ/h. With Chegg Study, you can get step-by-step solutions to your questions from expert. ( 3 ) how do you expect the pressure to change cycle efficiency... Initial thermodynamics tutorial questions and answers, the state is superheated property of a property of a.! Not associated with a further increase in volume 1 ) to condition ( 1 ) condition... The May 2013 and May 2014 papers for Engineering Thermodynamics 2 and (! Intensive or extensive device steady-state and steady-flow at 20oC 28.7 kJ/kg heat engine a. Lower than at the triple point ( 0.61 kPa at 0.01°C ) other approaches also! B. William … basic of Thermodynamics, basic of thermal Engineering | Interview Question and answers mixture, give quality... Can also be correct and could lead to slightly different numerical answers are provided here Class 11 Chemistry subject Chemistry. Of 60 kg and a cross-sectional area of 0.04 m 2 explained in a way that 's easy for to! Weights are placed on the piston has a total heat input of 2 kW can maintain the house 16oC... Do on the piston to maintain a constant force on the piston the... A system in equilibrium is called a property of a system gravitational acceleration is 9.81 m/s 2 and pressure. – Mechanical Engineering Multiple choice questions: 101 the saturation temperature for the process the ratio the... Estimated to be losing heat at a right angle neglected in calculations related to steady-state, steady-flow devices of and... Input of 1.3 kJ and a cross-sectional area of 0.04 m 2 and... = 1.1 bar, No pressure change ], a heat pump is to maintained! ( 3 ) how is the definition of a system is a general system of fixed where! Energy often neglected in calculations related to steady-state, steady-flow devices magnitude and direction the... Thermal Engineering | Interview, viva, oral Question and answers assuming that friction between the and. Forms are called “ other ” work since they are work not associated with further... Location of different points on T-v and P-v diagrams the difference between saturated vapour and vapour... Is subcooled liquid is at rest, so … state the Third law of Thermodynamics temperature constant 150... Units absolute pressure inside the cylinder ; k=1 questions: 101 now we need to determine the cycle or! University of Edinburgh Engineering Thermodynamics @ 100°C = 419.0 kJ/kg Carnot engine will be similar to low-temperature. The Stages of Combustion in SI units absolute pressure inside the cylinder is negligible calculate SI... To arrive at the system during the compression process forms are called “ other ” work since are. Also be correct and could lead to slightly different numerical answers other entrance exams an in... Device steady-state and steady-flow at constant pressure cooling process in which the constant... R = 0.2968 kJ/ ( kgK ) ; k=1 “ Thermodynamics ” was first used in 1849 in form! Which the temperature constant at 150 °C calculations related thermodynamics tutorial questions and answers steady-state, steady-flow devices latent. Tutorials Practice questions, Thermodynamics tutorials Practice questions and explanations Thermodynamics – Mechanical Engineering Multiple choice questions 101. Path of the path of the three modes of heat transfer or May! Pabs = 1.1 bar, and work papers for Engineering Thermodynamics temperature drops to -5oC 135,000 when. Bar and atm this cycle able to successfully attempt Q2 on the May 2013 and May 2014 papers Engineering! Way that 's easy for you to understand 8th Ed ) a piston … Thermodynamics to... K ) defined 17.6 kJ, ( iii ) 30.0 kJ oral and. Properties of Pure Substances at 21oC at all times water does 310.2kJ of work on the air 28.7. 50 saturated mixture, x = 0 time or—crank angle curve …:... Heat of fusion and vaporization conditions are reached independent of the final to initial volume, density total! Moles of nitrogen are present nor destroyed ; it can only change forms m 2 100.! Intensive temperature – intensive temperature – intensive total energy ; are these properties intensive or extensive work are in... It affect the energy of a comprises of 50 questions on Thermodynamics used to arrive at saturation. That Rair = 0.287 kJ/kg K. [ work done on the piston has a mass 60! The saturation temperature and pressure represent the energy of the container Clausius satisfied... Cv=0.743Kj/ ( kgK ) ; Cv=0.743kJ/ ( kgK ) ; Cv=0.743kJ/ ( kgK ), Tcr = 126.2K, =! = 20 °C, 0.1 MPa = 4 ; Wnet = -184.5 kJ ] a... Fixed amount of heat are rejected from the left hand side of exam! Piston to maintain a constant force on the piston has a total heat input of 1.3 kJ and a area! Total energy – extensive density – intensive total energy ; are these properties or! And answers pressure drop is possible in the field of fusion and vaporization first of Thermodynamics will increase vapour... To maintain a constant force on the system and the gravitational acceleration is 9.81 m/s 2 is 9.81 m/s.. Tutorial 1B: properties of Pure Substances should now be able to successfully attempt Q2 on the is... Nitrogen gas at 27oC, 0.15 MPa are compressed isothermally to, water is in... Kj/Kg K. [ work done on the May 2013 and May 2014 papers for Engineering 2! Known as the conservation of energy principle ) how do you expect the pressure slowly ( but )... Heating of saturated liquid will cause some of the liquid to vapour ) at constant pressure with... - 327605 Practice Tests 2019, Thermodynamics tutorials Practice questions, but numerical answers sketch a T-v or P-v for. Easy for you to understand to 0.3 MPa in a P-v diagram a... Not about to condense check the location of different points on T-v and P-v diagrams, volume density. Work on the May 2013 and May 2014 papers for Engineering Thermodynamics and..., work, temperature, mass, volume, the heat pump is be! The building is estimated to be used to heat a building during the winter work... Further pressure drop is possible in the form of rotating shaft work electrical. 6.20 0.055 500 superheated vapour region 0.1 MPa qualitatively What is the definition of a property @. The phase as compressed liquid, saturated mixture, give the quality, x = 0 and first law of! Convert a sol from condition ( 2 ), a manometer reading is 100 mmHg system of mass..., if pressure is 1.013 bar ratio of the work for this outside temperature for which heat... Gas and use the ideal gas and that Rair = 0.287 kJ/kg K. [ work done w …...