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JEE Mains · Physics · STD 11 - 11. thermodynamics

A solid body of constant heat capacity \(1\ J/^o C\) is being heated by keeping it in contact with reservoirs in two ways : \((i)\) Sequentially keeping in contact with \(2\) reservoirs such that each reservoir supplies same amount of heat. \((ii)\) Sequentially keeping in contact with \(8\) reservoirs such that each reservoir supplies same amount of heat. In both the cases body is brought from initial temperature \(100^o C\) to final temperature \(200^o C\). Entropy change of the body in the two cases respectively is :

  1. A \(ln \) \(2\),\(ln \) \(2\)
  2. B \(ln\) \(2\),\(2ln\) \(2\)
  3. C \(2\) \(ln\) \(2\),\(8ln\) \(2\)
  4. D \(ln\) \(2\),\(4ln\) \(2\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(ln \) \(2\),\(ln \) \(2\)

Step-by-step Solution

Detailed explanation

The entropy change of the body in the two cases is same as entropy is a state function.
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