Question: The internal energy of a system changes because the system gains 165 J of heat and performs 312 J of work. In returning to its

The internal energy of a system changes because the system gains 165 J of heat and performs 312 J of work. In returning to its initial state, the system loses 114 J of heat. During this return process,
(a) What work is involved, and
(b) Is the work done by the system or on the system?

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