Question: A 2 kg copper block at 100oC is brought in thermal contact with a 5 kg copper block at 50oC. Treating the combined system as

A 2 kg copper block at 100oC is brought in thermal contact with a 5 kg copper block at 50oC. Treating the combined system as an isolated system, show that at equilibrium the entropy (S) of the combined system reaches a maxima.

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