Thread: Did you know ?
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Old 10-05-2004, 20:55   #73
Theodoric
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Theodoric has reached the bronze age
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Re: Did you know ?
Quote:
Originally Posted by homealone
most substances shrink when they freeze & become more dense, as they cool.

- water becomes more dense as it cools until it reaches about 4°C, when it starts to become less dense - if this didn't happen, ice wouldn't float - and the water expands as it freezes, too.
It's all to do with hydrogen bonds. As is the fact that H2S is a gas at room temperature, whereas H2O is a liquid.
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