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Reg No.:_ Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
THIRD SEMESTER B.TECH DEGREE EXAMINATION(R&S), DECEMBER 2019

Course Code: ME205
Course Name: THERMODYNAMICS
(Permitted to use Steam tables and Mollier Charts)
Max. Marks: 100 Duration: 3 Hours
PARTA
Answer any three full questions, each carries 10marks. Marks

1 ച Define the following (1) Microscopic & Macroscopic View Points

(2) Thermodynamic Equilibrium (5)

b) Define Quasi-static Process. What are its characteristic features? (5)

2 9) Explain constant volume gas thermometer with neat diagram. (5)
b) Distinguish between flow work and displacement work. Why does free

expansion have zero work transfer? 8

3 2) State the first law for a closed system undergoing a change of state. Show that 5)

energy a property of the system.

b) 1.5 kg of liquid having a constant specific heat of 2.5kJ/kgK is stirred in a well
insulated chamber causing the temperature to rise by 15°C. Find change in (5)
internal energy and work done for the process.

4 Derive steady flow energy equation for a single stream entering and a single
stream leaving a control volume and explain the various terms in it. Under what (10)
conditions does the steady flow energy equation reduces to Euler's equation

PART ‏تا‎
‎Answer any three full questions, each carries 10marks.

5 9) Explain two statements of second law of thermodynamics. Establish its (5)
equivalence.

b) A heat engine operating between two reservoirs at temperatures 600°C and 4070൨ (5)
drives a refrigerator operating between reservoirs at temperatures of 400C and
-15°C. The heat transfer to the heat engine is 2500kJ and the net output of the
combined engine and refrigerator plant is 400kJ. The efficiency of the heat
engine and the COP of the refrigerator are each 40% of the maximum possible
values. Estimate heat transfer to the refrigerant and the net heat transfer to the

reservoir at 40°C.

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