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

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

A closed system is cooled reversibly from 100°C to 50°C. If no work

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