If a system loses 30 J of heat and 20 J of work is done on it, what is ∆U? - THERMODYNAMICS Quiz | GKFix.in

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Question

If a system loses 30 J of heat and 20 J of work is done on it, what is ∆U?

A. 50 J
B. 10 J
C. –10 J
D. –50 J