Heat and Thermodynamics 6 Question 3

7. A solid body of constant heat capacity 1J/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 100C to final temperature 200C. Entropy change of the body in the two cases respectively, is

(2015 Main)

(a) ln2,ln2

(b) ln2,2ln2

(c) 2ln2,8ln2

(d) ln2,4ln2

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Answer:

Correct Answer: 7. (d)

Solution:

  1. Entropy is a state functions. Therefore in both cases answer should be same.


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