Who Does Evaporation Cool a Liquid?

The necessary heat of evaporation

is extracted from the sweat itself, which leads to a heat transfer from the liquid into the gaseous state. This results in a cooling effect (called evaporative cooling) that helps to maintain body temperature and cools the body down when it gets too hot.

Who evaporation causes cooling?

When a molecule at the surface uses enough energy to exceed the vapour pressure, the liquid particles will typically escape and enter the surrounding air as a gas. The energy taken from the vaporised liquid during evaporation lowers the temperature of the liquid, resulting in evaporative cooling.

How does evaporation cooling work?

As perspiration evaporates it absorbs heat to cool your body. The principle underlying evaporative cooling is the fact that water must have heat applied to it to change from a liquid to a vapor. When evaporation occurs, this heat is taken from the water that remains in the liquid state, resulting in a cooler liquid.