How much heat (kJ) is needed to convert 25.0 g of solid ethanol at -135�C to liquid ethanol at -50�C?

Ethanol (C2H5OH) melts at -114�C. The enthalpy of fusion is 5.02 kJ/mol. The specific heats of solid and liquid ethanol are 0.97 J/g-K and 2.3 J/g-K, respectively.