b. Perspiration dries on a person's skin.
Vaporization, conversion of a substance from the liquid or solid phase into the gaseous phase.
Evaporation is a phase transition from the liquid phase to vapor (a state of substance below critical temperature) that occurs at temperatures below the boiling temperature at a given pressure.
When we are sweating:
Some of sweat has to evaporate off of your skin for this process to actually work. That's because cooling your body via sweating relies on a principle of physics called "heat of vaporization."
It takes energy to evaporate sweat off of your skin, and that energy is heat. As your excess body heat is used to convert beads of sweat into vapor, you start to cool down.
When the sweat hits the air, the air makes it evaporate (this means it turns from a liquid to a vapor.
As the sweat evaporates off your skin, you cool down.
Sweat is a great cooling system, but if you're sweating a lot on a hot day or after playing hard you could be losing too much water through your skin.
Learn more about vaporization here:
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