What amount of heat (in kJ) is required to convert 26.8 g of an unknown solid (MM = 92.14 g/mol) at -115.0 C to a liquid at 32.3 C? (specific heat capacity of solid = 1.06 J/g C; specific heat capacity of liquid = 1.71 J/g C; Hfus = 6.61 kJ/mol; normal freezing point, Tf = -95.0 C)