Question #81929

A closed system is cooled reversibly from 100°C to 50°C. If no work is done on the system________________?

A) its internal energy (U) decreases and its entropy (S) increases

B) U and S both decreases

C) U decreases but S is constant

D) U is constant but S decreases

Answer: A closed system is cooled reversibly from 100°C to 50°C. If no work is done on the system U and S both decreases.

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