What amount of heat (in kJ) is required to convert 12.0 g of an unknown liquid
(MM = 58.08 g/mol) at 15.8 °C to a gas at 143.2 °C? (specific heat capacity of liquid = 2.15 J/g• °C; specific heat capacity of gas = 1.47 J/g• °C; AHvap = 31.3 kJ/mol; normal boiling point, Tb =
56.05 °C)