what causes condensation on the inside of windows, particularly when it’s warmer inside and cooler outside?
In: Chemistry
Ever heard the term “relative humidity,” or a humidity expressed as a percentage? “It’s 80 degrees today, with the humidity up around 70%,” etc.
Turns out, there is a maximum amount of moisture that air can hold. Also, turns out that warm air can hold more moisture than cool air. So, the air *inside* your warm room is holding some amount of moisture that it can comfortably hold (so, it’s not raining in your room), but when it comes into contact with the cold window pane, that same amount of moisture now exceeds the capacity of the cooled air. The excess comes out of the air as liquid water.
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