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That is, water has a high heat of vaporization, the amount of energy needed to change one gram of a liquid substance to a gas at constant temperature. Waterâs heat of vaporization is around 540 cal/g at 100 Â°C, water's boiling point. Note that some molecules of water â ones that happen to have high kinetic energy â will escape from the surface of the water even at lower temperatures.
Answer: the same way water cools down a hot pan... water absorbs heat and evaporates thus causing your body to cool down its the evaporation of the sweat once it is on the surface of your skin that creates the cooling effect.Answer: It takes heat to convert moisture into a vapour, and this heat is supplied by the body via the skin, The loss of heat is felt as cooling.O, Sweat evaporates off the skin helping to cool you down, wiping it off will make you hotter.