Question: A closed system is cooled reversibly from 1 0 0 C to 5 0 C . If no work is done on the system its

A closed system is cooled reversibly from 100C to 50C. If no work is done on the system
its internal energy (U) decreases and its entropy (S) increases
U and S both decreases
U decreases but S is constant
U is constant but S decreases

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