Chemistry students at Carleton College are having fun with liquid nitrogen!
Click on image for full size (32K JPG)
Image from the Carleton College Chemistry Department
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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).
If conditions are just right, 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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