81. Calculate the change in entropy during the transformation of 1 kg of H2O, taken at 0 C, into steam at 110 C. The specific heat of evaporation of water is 2255.17 * 103 J / kg. The specific heat capacity of liquid water is 4.184*103 J/(Kg*K). The specific heat capacity of water vapor at p=const is 1912 J/(Kg*K).

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