A closed system is cooled reversibly from 100Â°C to 50Â°C. If no w – McqOptions

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1.	A closed system is cooled reversibly from 100Â°C to 50Â°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» C. U decreases but S is constant.

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