Ethyl alcohol has a boiling point of 78.0oC, t freezing point of 114oC, a heat of

Question:

Ethyl alcohol has a boiling point of 78.0oC, t freezing point of – 114oC, a heat of vaporization of 879kJ/kg, a heat of fusion of 109kJ/kg, and a specific heat of 2.43 kJ/kg ∙ K. How much energy must be removed from 0.510 kg of ethyl alcohol that is initially a gas at 78.0'C so that it becomes a solid at – 114oC?