Heat Engines, Refrigerators & Second Law
A solid body of constant heat capacity is being heated by keeping it in contact with reservoirs in two ways:
Sequentially keeping in contact with reservoirs such that each reservoir
supplies same amount of heat.
Sequentially keeping in contact with reservoirs such that each reservoir
supplies same amount of heat.
In both the cases body is brought from initial temperature to final temperature . Entropy change of the body in the two cases respectively is:
Show answer and solution
Answer: (d)
- Entropy is a state function: depends only on the initial and final states of the body.
- in both cases.
- The number of reservoirs used does not matter, so both changes are equal.
- So the answer is (d): the same value in both cases.