The duster can I use always gets really cold whenever I use it for long enough. Can someone explain in the simplest way possible the reason why it gets cold?
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You know how you can boil water by adding heat to it? The reverse is also true; if you force it to turn into a gas by putting it in a vacuum chamber, it “sucks” heat from the surroundings. This is true for all matter.
The liquid they put in duster cans boils at a very low temperature, but is kept under pressure by the can, so it stays liquid. When you release gas from the can, the liquid starts boiling off, and as it goes from a liquid to a gas, it “sucks” heat from its surroundings!
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