Carbon dioxide gas that has been cooled to below -78.5ºC and converted to a solid.
It is called dry ice because of its similar appearance and low temperature. However, unlike ice, which melts to give the liquid water, dry ice does not melt but goes directly from a solid to a gas. This process is called sublimation and produces 845 volumes of gas for each volume of solid.
Properties:
Boiling point
-78.5°C
Density
1564kg/m3
Relative density
1.56 (Water = 1)
Ratio to volume of gas
1 : 845 (At room temperature)
Dry ice
Carbon dioxide gas that has been cooled to below -78.5ºC and converted to a solid.
It is called dry ice because of its similar appearance and low temperature. However, unlike ice, which melts to give the liquid water, dry ice does not melt but goes directly from a solid to a gas. This process is called sublimation and produces 845 volumes of gas for each volume of solid.