Editing Vaporization (section)

==Evaporation==
[[File:77855181 bromine624.jpg|alt=|thumb|300x300px|A [[laboratory flask]] filled with pure [[bromine]], a liquid that evaporates rapidly]]
Evaporation is a phase transition from the liquid phase to vapor (a state of  substance below [[critical temperature]]) that occurs at temperatures below the [[Boiling point|boiling temperature]] at a given pressure. Evaporation occurs ''on the surface''. Evaporation only occurs when the [[partial pressure]] of [[vapor]] of a substance is less than the [[Equilibrium Vapor Pressure|equilibrium vapor pressure]]. For example, due to constantly decreasing pressures, vapor pumped out of a solution will eventually leave behind a cryogenic liquid.