 Water has a lower molar mass and a higher boiling point  Dispersion forces do not account for this

Ion-Dipole Forces Exist when ions and dipole present Stronger than simply dipole-dipole Dipole-Dipole Forces Between polar molecules only Larger dipole = larger force Dispersion Forces Between all molecules Higher molar mass = larger force Hydrogen Bonding Strongest IM Force Exists only between H with either N, O, or F

 Vapor pressure increases nonlinearly with temperature  More molecules have enough KE to escape into gas phase