Three different processes act on a system A. In process A, 57 J of work are done

Question

Three different processes act on a system A. In process A, 57 J of work are done on the system and 75 J of heat are added to the system. Find the change in the system's internal energy. Express your answer as a whole number. B. In process B, the system does 57 J of work and 75 J of heat are added to the system. What is the change in the system's internal energy? Express your answer as a whole number. C In process C, the system's internal energy decreases by 126 J while the system performs 126 J of work on its surroundings. How much heat was added to the system? Express your answer as a whole number.

Explanation / Answer

a)IE=Q+W=57+75=132 J ans b)IE=Q+W=75-57=18 J ans

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