Question

Ethanol melts at -144°C and boils at 78°C. The enthalpy of fusion of ethanol is 5.02 kJ per mole and its enthalpy of vaporization is 38.56 kj/mol the specific heats of solid and liquid 0.97J/g•K and 2.3 J/ g•K. How much heat is required to convert 9.02 g of ethanol at - 141゚C to the vapor phase at 78゚C.

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