Why evaporation is a cooling process?

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Solution

Evaporation
Evaporation is a process by which a liquid is transformed into vapor.
Reason for cooling
Liquids require more energy to transform into gases, thus they must draw that energy from their surroundings.
The energy is heat, and as the heat escapes with the evaporating liquid, the area becomes cooler.

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Evaporation is the change of liquid to the vapor state at any temperature below the boiling point of the liquid. Though both evaporation and boiling represent change of state, but these are different. Whereas evaporation occurs at all temperature, boiling occurs only at a specific temperature known as boiling point temperature. Moreover, evaporation is a surface phenomenon but boiling occurs throughout the liquid including its surface.

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