ps4_final

ps4_final - 16.050 Thermal Energy Time spent on problems:...

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16.050 Thermal Energy Problem Set #4 – Fall 2002 Time spent on problems: Problem 1: Problem 2: Problem 3: Problem 4: Problem 5: Problem 6:
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16.050 Thermal Energy Problem Set #4 – Fall 2002 Do all problems. Please use a separate sheet of paper for each problem. 1. A quantity of air undergoes a thermodynamic cycle consisting of three processes in series. Process 1-2: constant-volume heating from P 1 = 0.1 MPa, T 1 = 15 o C, V 1 = 0.02 m 3 to P 2 = 0.42 MPa Process 2-3: constant-pressure cooling Process 3-1: isothermal heating to the initial state Employing the ideal gas model with c P =1 kJ/kgK, evaluate the change in entropy for each process. Sketch the cycle on P-v coordinates. 2. A liquid system whose mass is m kg at temperature T was formed by adiabatically bringing together two equal masses of the liquid; initially, one mass was at T 1 and the other at T 2 . Derive the entropy production for the system. Prove that the entropy production for the system must be positive. Assume that the liquid has a
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This note was uploaded on 01/28/2012 for the course AERO 16.050 taught by Professor Zoltanspakovszky during the Fall '02 term at MIT.

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ps4_final - 16.050 Thermal Energy Time spent on problems:...

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