0 20658 (Pages : 2) வாரி? அவைத்‌ வைக

SIXTH SEMESTER U.G. DEGREE EXAMINATION, MARCH 2022
(CBCSS—UG)
Physics/Applied Physics
PHY 6B 10/APH 6B 10—THERMODYNAMICS
(2019 Admissions)
Time : Two Hours Maximum : 60 Marks
The symbols used in question paper have their usual meanings
Section A (Short Answer Type)

Answer at least eight questions.
Each question carries 3 marks.
All questions can be attended.

Overall Ceiling 24.

1. Distinguish between reversible and irreversible processes.

2. Isit possible to get a Carnot’s engine with 100 % efficiency ? Explain.

3. Plot the TS diagram for various reversible processes of a hydrostatic system.
4. State the mathematical form of entropy principle and explain it.

5. What is Joule- Thomson expansion ? What is its use ?

6. Distinguish between first and second order phase transitions.

7. Which are the macroscopic quantities, required to describe the materials in a cylinder of an

automobile engine ?
8. State and explain the zeroth law of thermodynamics.
9. Explain thermal equilibrium.
10. What are the features of quasi-static process ?
11. Give the mathematical formulation of the first law of thermodynamics and its related ideas.

12. Comment on the molar heat capacities of ideal gases.
(8 x 3 = 24 marks)

Turn over

93739