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QJEEM15Ph984b: JEE Main 2015 Physics - Class 11 JEEM15Ph984b Solution: A solid body of constant heat capacity 1 J / ∘ C is being…

A solid body of constant heat capacity 1 J/∘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∘C to final temperature 200∘C. Entropy change of the body in the two cases respectively is :

Multiple Choice Options

  • A ln2,2ln2
  • B 2ln2,8ln2
  • C ln2,4ln2
  • D ln2,ln2

Step-by-Step Verified Solution

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

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