The molar enthalpy of vaporization of water at 373 K is 41.16 kJ/mol. What fraction of this

Question:

The molar enthalpy of vaporization of water at 373 K is 41.16 kJ/mol. What fraction of this energy is used to change the internal energy of the water, and what fraction is used to do work against the atmosphere? (Assume that water vapor is an ideal gas.)