question_answer

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 100°C to final temperature 200°C. Entropy change of the body in the two cases respectively is:                                                                  [JEE MAIN 2015]

A)  \[\ln \,2,\,2\ln \,2\]         

B)       \[2\ln 2,\,\,8\ln \,2\]

C)  \[\ln \,2,\,4\ln \,2\]         

D)       \[\ln \,2,\,\ln \,2\]

Correct Answer: D

Solution :

[d]

or