How is internal energy change (∆U) related to heat and work in a closed system? - THERMODYNAMICS Quiz | GKFix.in

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Question

How is internal energy change (∆U) related to heat and work in a closed system?

A. ∆U = q - w
B. ∆U = w - q
C. ∆U = q × w
D. ∆U = q + w