Q58 / 71 · NEST (NISER) 2015 · Physics

A body of mass $m$ with specific heat $C$ at temperature 500 K is brought into contact with an identical body at temperature 100K. The system is isolated from the surroundings during the process. The change in entropy of the system is

A
$m C \ln 5$
Correct answer
B
$m C \ln (9 / 5)$
C
$m C \ln 3$
D
$m C \ln (5 / 3)$

Hence, the correct answer is option: 'B'.

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