The temperature of liquid water and the temperature of water vapor are associated with the average kinetic energy of the water molecules.
The word average implies that some of the molecules have a greater kinetic energy and others have less.
If a molecule of water that has an exceptionally high kinetic energy is near the surface and is headed in the right direction,
it may overcome the attractive forces of the other water molecules and escape the liquid to become a gas.
This is the process of evaporation.
A supply of energy must be present to maintain the process of evaporation,
and the water robs this energy from the surroundings.
This explains why water at a higher temperature evaporates more rapidly than water at a lower temperature.
More energy is available at higher temperatures to maintain the process at a faster rate.
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