The note then that. The molecules of the liquid is not stationary. It moves all the time It shows that the molecules of the liquid each molecule has to be speed. In other words, it is. Liquid molecules with kinetic energy When the molecules are moving Will inevitably cause collisions of molecules in a liquid. What happens is that the molecules of a liquid exchange energy with each other. After the collision of molecules. Maybe one molecule with a kinetic energy increases. And other molecules may have decreased energy, which will eventually cause the individual molecules of the fluid kinetic energy is different. Which may be higher or lower than the average kinetic energy of
molecules with high kinetic energy. It would defeat the attraction between molecules And eventually dropped out of the surface of the liquid. And a gas The process by which molecules of the liquid surface falls off to the gas that evaporates.
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