Temperature at about or below 32 degrees Fahrenheit. This is because 32 degrees Fahrenheit is ideal for forcing together carbon dioxide molecules with a gas called trehythition. This gas gives the carbon dioxide glue for them to bond. Once carbon dioxide becomes a solid, it is nicknamed dry ice.
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To make carbon dioxide solid, you need to expose it to temperatures below -78.5°C (-109.3°F) and high pressures (at least 5.1 atmospheres). This process is known as carbon dioxide sublimation, where the gas turns directly into a solid without passing through the liquid phase.
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 at home! It is formed by super-cooling heated carbon dioxide at very extreme pressure (about 400 000 times the earths atmosphere) in a diamond anvil. It is very unstable, however, and reverts instanly to gas when pressure is released.
Dry Ice is formed through a process known as Deposition. It is produced by cooling Carbon Dioxide to around minus 80 degrees Centigrade at slightly elevated pressures.
we could only turn carbon dioxide which is the gaseous state if we would apply pressure and decrease its temperature
Carbon dioxide solidifies while under pressure and at low temperatures, turning solid at −109°F (178.5°C). Solidified carbon dioxide is called a dry ice.
the cold air can change the carbon dioxide gas to a solid
the cold air can change the carbon dioxide gas to a solid
Dry ice is solid carbon dioxide (CO2). When dry ice is exposed to warmer temperatures, it sublimates directly from a solid to a gas without passing through the liquid phase. This process releases carbon dioxide gas, which is what creates the characteristic "smoky" effect.
The carbon dioxide is changing from a solid to a gas directly through a process called sublimation. Dry ice is solid carbon dioxide at a temperature of -78.5°C, and when it warms up to room temperature, it sublimes into carbon dioxide gas without passing through the liquid phase.
Roots do not make carbon dioxide.