You are given the data for the standard enthalpy of vaporization (AH vap) for the following liquids. Which one would you expect to have the largest vapor pressure?

O CH₃SCH₃, 28 kJ-mol⁻¹
O (CH₃)₂CO, 31 kJ-mol⁻¹
O (CH₃)₂NH, 26 kJ-mol⁻¹
O CH₃CH₂NH₂, 29 kJ-mol⁻¹
O CH₃CH₂OH, 39 kJ-mol⁻¹