2051Chemical EngineeringMedium
A closed system is cooled reversibly from 100°C to 50°C. If no work is done on the system________?
AU and S both decreases
BU decreases but S is constant
CU is constant but S decreases
Dits internal energy (U) decreases and its entropy (S) increases
Correct answer
A. U and S both decreases
Explanation
The correct answer is U and S both decreases.