Self-explanatory
In: Chemistry
The alcohol evaporates quite quickly. Evaporation is a state change from a liquid to a gas and it requires energy and the energy that is used is heat from your skin so you cool down.
This is the exact same reason you get cooled down when you sweat, the water requires energy to evaporate, it just happens at a lower rate.
The need of energy is why you need to continue to heat water at boiling temperature for it to continue boiling. Boiling is evaporation but at an unlimited rate and it requires energy to and will cool down the water below the boiling temperature if you remove it from the heat source.
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