The same as most substances, CO2 must be cooled and put under increased pressure to become a solid. At one atmosphere, CO2 must be cooled to a temperature of -78.5 degrees Celsius to solidify. At...
The state is dependent upon the temperature. At 70 degrees F and below, some of the carbon dioxide is in the form of a liquid, with some vapor. If the temperature exceeds 88 degrees F (the critical...
Strangely, Carbon Dioxide can exist as a solid in 2 forms. It can be a glass-like but amorphous solid, called Carbonia, or in its' more usual form as Dry Ice. Carbonia is not something you can make...