Question: A process occurs in which the entropy of a system increases by 125 J/K. During the process, the energy that becomes unavailable for doing work

A process occurs in which the entropy of a system increases by 125 J/K. During the process, the energy that becomes unavailable for doing work is zero.
(a) Is this process reversible or irreversible? Give your reasoning.
(b) Determine the change in the entropy of the surroundings.

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