4

4) A natural antiseptic and disinfectant, ethanol is produced by the fermentation of sugars by yeast or by petrochemical processes like ethylene hydration. Ethanol has a melting point of 114C and a boiling point of 78C. Its enthalpy of vaporization is 38.56kJ/mol and the enthalpy of fusion is 5.02kJ/mol. The specific heats of solid and liquid ethanol are 0.97J/gK and 2.3J/gK, respectively. How much heat is required to convert 42.0g of ethanol at 155C to the vapor phase at 78C