Question

What is the enthalpy of vaporization of water at 100°C if it requires 40.7 kJ of energy to vaporize 1 mole of water?

Answer 1

The enthalpy of vaporization  Hvap  is the amount of energy required to convert 1 mole of a substance from the liquid phase to the gas phase at a constant temperature. In this case, the energy required to vaporize 1 mole of water at 100C is given as 40.7 kJ.Therefore, the enthalpy of vaporization of water at 100C is 40.7 kJ/mol.