Chapter 11, Problem 11.49SP

How much energy in kilojoules is released when 25.0 g of ethanol vapor at 93.0 °C is cooled to -11.0 °C? Ethanol has mp = 114.1 °C, bp = 78.3 °C, $\Delta H_{\text{vap}}=38.56\text{ kJ/mol,}$ and $\Delta H_{\text{fusion}}=4.93\text{ kJ/mol}\text{.}$ The molar heat capacity is 112.3 J/(K · mol) for the liquid and 65.6 J/(K·mol) for the vapor.