Heat of Vaporization

Heat required to vaporize one mole of a substance at its boiling pointTemperature at which the vapor pressure of a liquid is equal to the ambient pressure - thus, the boiling point depends on pressure. A liquid may change to a gas at temperatures below the boiling point by evaporation. However, evaporation is a surface phenomenon where only molecules located near the Click on Term to Read More under standard pressure (101,325 Pa). The heat of vaporizationEquivalent to heat of vaporization, and latent heat of a substance. It is the amount of heat that must be removed from one gram of a vapor at its condensation point to condense the vapor with no change in temperature. Click on Term to Read More is expressed in kJ/mol.