Q. 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
(B) U and S both decreases
(C) U decreases but S is constant
(D) U is constant but S decreases

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✅ Correct Answer: (B) U and S both decreases

Published by Team MCQ Buddy ⭐ 29.34K Points at 07-May-2023 09:43 pm in Chemical Engineering Thermodynamics

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