Tuesday, June 16, 2015

Science Facts: Dry Ice

Dry ice is solid carbon dioxide and is made by putting carbon dioxide under high pressure and cooling it. At regular air pressure, dry ice turns into a gas at -78.5 C. Dry ice was discovered by a French scientist in 1835 who cooled carbonic acid to -194 F. I wonder how people produced temperatures that low in the 19th century.

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