•The process by which a liquid is converted into a vapor.
•In the liquid phase, the substance is held together by intermolecular forces.
•As the temperature is raised, the molecules move more vigorously, and in increasingly high proportion have sufficient energy to escape from their neighbors.
•Evaporation is slow at low temperature but faster at high temperature.
•Evaporation is an endothermic (heat-absorbing) process because molecules must be supplied with energy to overcome the intermolecular forces.