Chemistry students at Carleton College are having fun with liquid nitrogen!
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Image from the Carleton College Chemistry Department
Liquid Hydrogen
As shown in this picture, the element Nitrogen, when kept very cold, is a liquid. In this picture the liquid can be seen evaporating (changing
phase from a liquid to a gas).
Under conditions of extreme pressure such as those found within the giant planets, the element Hydrogen, which is normally a gas, becomes a liquid, just as Nitrogen does if the temperature is just right.
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