Concepts Of Physics MCQ Edition [Volume 2]PhysicsLaws of Thermodynamics
In a process carried out on a system, the initial pressure and volume are identical to the final pressure and volume.
Options
- AThe net work done by the system during the process must be zero
- BThe net heat given to the system during the process must be zero
- CThe initial internal energy must equal the final internal energy
- DThe initial temperature must equal the final temperature
Correct answer
D. The initial temperature must equal the final temperature
Step-by-step solution
For a given thermodynamic system, the state is uniquely determined by its pressure and volume. Since the initial pressure and volume are identical to the final pressure and volume, the system returns to its initial state. Internal energy and temperature are state functions, meaning they depend only on the state of the system and not on the path taken. Therefore, the initial internal energy must equal the final internal energy, and the initial temperature must equal the final temperature. Work done and heat exchange