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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. [Wrong Answer] |
B. | U and S both decreases [Correct Answer] |
C. | U decreases but S is constant. [Wrong Answer] |
D. | U is constant but S decreases. [Wrong Answer] |