蒸发是液体汽化的一种方式.从分子动理论的角度看,蒸发是处于液体表面的液体分子的动能大到可以克服液体表层分子的引力做功,而脱离液面成为气体分子的过程.液体蒸发时,若单位时间内脱离液面的分子数大于返回液面的分子数,蒸发可以持续进行.如果液体装在密闭容器内,从液体表面蒸发的分子数不断增加,使蒸气分子数的密度随 Evaporation is a way of vaporization of liquids. From the perspective of molecular dynamics theory, evaporation is a process in which the kinetic energy of the liquid molecules on the liquid surface is large enough to overcome the gravitational force of the surface molecules of the liquid, and the process of detachment from the liquid surface becomes a gas molecule. Liquid evaporation When the number of molecules leaving the liquid surface per unit time is greater than the number of molecules returning to the liquid surface, evaporation can continue. If the liquid is contained in a closed container, the number of molecules evaporating from the surface of the liquid increases continuously, so that the density of vapor molecules is accompanied by