Three different processes act on a system. (a) In process A, 42 J of work are done
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Three different processes act on a system.
(a) In process A, 42 J of work are done on the system and 77 J of heat are added to the system. Find the change in the system's internal energy.
(b) In process B, the system does 42 J of work and 77 J of heat are added to the system. What is the change in the system's internal energy?
(c) In process C, the system's internal energy decreases by 120 J while the system performs 120 J of work on its surroundings. How much heat was added to the system?
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