The specific heat of liquid ethanol, c2h5oh(l), is 2. 46 j/g·°c and the heat of vaporization is 39. 3 kj/mol. The boiling point of ethanol is 78. 3 °c. What amount of enthalpy is required to heat 50. 0 g of liquid ethanol from 23. 0 °c to ethanol vapor at 78. 3 °c?.