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calculate the total change in entropy if 2.55 kg of water at 17.5 c is mixed with another 5.75 kg of water at 67.5 c

calculate the total change in entropy if 2.55 kg of water at 17.5 c is mixed with another 5.75 kg of water at 67.5 c . the specific heat of water at constant pressure is 4186j/(kg.k)

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