chemistry AP

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Give a scientific explanation for the following observations: Perspiring is a mechanism for cooling the body
-is it because when something is heated it produces a salt and h2o, so when our body heats up the chemicals in our body let out salt and water, essentially combining to make perspiration. also, it helps to keep a balance in temperature in our body...

  • chemistry AP -

    No. It takes energy (heat) to evaporate the water that appears on the skin when we sweat. Taking heat away from the body is cooling the body.

  • chemistry AP -

    A word or two about your statement of something being heated producing salt and water. That isn't true unless salt was in the water initially. And then salt shows up only if enough water is evaporated to produce a saturated solution.

  • chemistry AP -

    Also, does the relatively high specific heat of water play a part in this? Because it would take large amounts of energy to raise the temperature of the sweat, therefore keeping the sweat cool.

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