When a liquid reaches a certain critical temperature, any added heat will go into changing the liquid into a gas. This temperature is the boiling point. Boiling is very rapid evaporization. Because hot vapor escapes the liquid and takes energy with it, boiling can be thought of as a cooling process
(for the remaining liquid anyway).
Click the button below to see Jearl Walker boil liquid nitrogen in his mouth, converting it to a gas.
DON'T TRY THIS AT HOME!
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