Thermodynamics - NEET Physics Questions

Question 31: moderate

Consider the following statements

A. Work and heat are path functions in thermodynamics.

B. The internal energy of a gaseous system is state function.

C. For gaseous system, CP is greater than CV .

D. Work done by gas at constant volume is zero.

Based on above information pick the correct option.

1. Only statement (A) is correct

2. Only statements (A), (B) and (C) are correct

3. Only statements (B), (C) and (A) are correct

4. All statements (A), (B), (C) and (D) are correct

View Answer

All the given statements are correct:

A. Work and heat depend on the path taken during a process, so they are path functions.
B. Internal energy depends only on the state of the system, making it a state function.
C. For gases, $C_P > C_V$

because extra heat is required at constant pressure to do expansion work.
D. At constant volume, the gas does no work since volume does not change ( $W = P\Delta V = 0$

).