a liquid to a gas is considered vaporization. if this change of state takes place below the boiling point of the liquid, it is called evaporation . evaporation, however, is a surface phenomenon in which only those molecules located near the gas/liquid interface can evaporate. boiling, on the other hand...
but are liquid at atmospheric pressure after being recovered from oil well (casinghead) gas in lease separators and are subsequently commingled with the crude stream without being separately measured. lease condensate recovered as a liquid from natural gas wells in lease or field separation facilities...