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Feb4-13, 11:07 AM
P: 126
Because at the surface of the liquid is where the a tiny amount of water molecules reaches 100 degrees
A substance, water for example, doesn't need to be at 100C for evaporation to take place. 100C, for water at least, is the boiling point.

So how can heat be transferred to the surface if the heat should be dissipated such that the temperatures are equal, how can the temperature of the surface be hotter than the rest of the molecules?
It doesn't mean that all the molecules in the substance have an equivalent level of energy. Temperature is the average kinetic energy in the molecules of a substance.