What amount of heat (in kJ) is required to convert 29.1 g of an unknown solid (MM = 67.44 g/mol) at -15.4 C to a liquid at 42.7 C? (specific heat capacity of solid = 1.95 J/g.C; specific heat capacity of liquid = 1.18 J/g. C; AHfus = 5.72 kJ/mol; normal freezing point, Tf = 28.3C) What amount of heat (in kJ) is required to convert 14.2 g of an unknown liquid (MM = 83.21 g/mol) at 19.2 C to a gas at 93.5 C? (specific heat capacity of liquid = 1.58 J/g. C; specific heat capacity of gas = 0.932 J/g.C; AHvap = 22.5 kJ/mol; normal boiling point, Tb = 57.3C)