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4. If 161 g of water at 85°C is cooled to ice at 0°C, find the change in heat content of the system.
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4.161g water Molecular weight of water = 18 g/mol so, 161g waten 8.944 mol Here the process involve two state, 85°c water - 0As the temperature is falling. so heat will be released from the system. ist state (85°c water --- 68°c waten) change in heat

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