Biology / Unit 1 Bio 0148 short lesson, about 20 seconds
Water's Heat of Vaporization
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The idea
Water's heat of vaporization is the large amount of energy required to convert one gram of liquid water into vapor, because hydrogen bonds must break first.
In practice
Sweat evaporating from skin carries away a large amount of body heat with it, cooling the skin in the process.
Where people slip
Vaporization removes heat from the surface it leaves, which is why evaporation cools rather than warms.
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