7. Ethanol , CH
3
CH
2
OH
, melts at 114
O
C and boils at 78
O
C . The enthalpy of fusion of ethanol is
5.02 kJ/mol and its enthalpy of vaporization is 38.56 kJ/mol . the specific heat of solid and liquid
ethanol are 0.97 J/g-K and 2.3 J/g-K , respectively . How much heat is required to convert 50.00
g of ethanol at 150
O
C to the vapor phase at 78
O
C.