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Two finite, identical, solid bodies of constant total heat capacity per body, Cp, are used as heat sources to
drive a heat engine. Their initial temperatures are T and T2. The reservoirs remain at constant pressure and
do not change phase. Finally afterwards, because of the work done by the heat engine, the two reservoirs arrive
at a common temperature Tf. First, find the final temperature T; (hint, use the second law to find it). Find the
maximum work obtainable from the system.

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