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The phase change from gas to solid is called deposition.

For example, at 5 times normal air pressure, liquid carbon dioxide would form around -56°C (-70 °F). But at normal pressure, the liquid is unstable and tends to remain a gas. Cooling the gas further to -78.5 °C (-109.3 °F) will form solid dry ice.

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What kind of process is sublimation?

Sublimation is a physical change of state, from solid directly to gas.


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