Solved Important 16 marks Long Questions

SOLVED QUESTIONS

1. Show that the efficiency of the reversible heat engine depends only on the maximum and minimum absolute temperature in the cycle.

Refer chapter 2.3 on Page 2.3.

2. How do you minimize the energy consumed by your domestic refrigerator?

Refer chapter 2.4.1 on Page 2.5.

3. Differentiate between heat pump and refrigerator.

Refer chapters 2.4 and 2.5 on Pages 2.4 & 2.6.

4. Determine the expressions for the thermal efficiencies and coefficients of performance or reversible heat engines, heat pumps and refrigerators.

Refer chapters 2.3, 2.4 and 2.5 on Pages 2.3, 2.4 & 2.6 respectively.

5. State the second law of thermodynamics.

Refer chapter 2.6 on Page 2.6.

6. State and explain corollaries of second law thermodynamics.

Refer chapter 2.7 on Page 2.8.

7. List out and explain various causes of irreversibility.

Refer chapter 2.10 on Page 2.11.

8. Draw the Carnot cycle on p-V and T-s diagram to derive its efficiency and explain the major inference from Carnot cycle efficiency.

Refer chapter 2.11 on Page 2.11.

9. State and prove Carnot Theorem.

Refer chapter 2.13 on Page 2.14.

10. Describe thermodynamic temperature scale with a neat sketch. 

Refer chapter 2.14 on Page 2.15.

11. State and prove Clausius inequality.

Refer chapter 2.17 on Page 2.61.

12. Mention the Clausius inequality for open, closed and isolated systems.

Refer chapter 2.17 on Page 2.61.

13. Briefly discuss about the concept of entropy.

Refer chapter 2.20 on Page 2.64.