Living · 6 pages · 12 min
How sweat cools
Sweat cools only as it evaporates, because the change from liquid to vapor takes up heat.
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From the opening
Sweat cools the body when water on the skin becomes vapor and takes the latent heat of that change away from the skin. The liquid is not a cold fluid applied from outside, and the cooling is the energy cost of evaporation. The opening covers latent heat leaves with the vapor, eccrine glands supply the water, and dry moving air speeds evaporation.
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Inside
- Latent heat leaves with the vapor
- Eccrine glands supply the water
- Dry moving air speeds evaporation
- Wiping liquid away spends the chance
- Where the idea stops applying
- A distinction worth keeping
Sources
- Evaporative cooling and the latent heat of vaporization
- Eccrine sweat paired with skin blood flow