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This change is called sublimation and occurs in some substances at normal temperature and pressure, one of the best known being, Carbon Dioxide (CO2). In its solid state ("Dry" Ice), normal atmospheric pressure is insufficient to prevent the CO2 molecules from escaping from the surface, thus the solid appears to "evaporate", going directly to the gaseous state without the intervening liquid state. The reverse of this process is called deposition.

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14y ago
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13y ago

Sublimation is the transformation of a solid to a vapor without first becoming liquid, such as happens with the gradual evaporation of ice and snow during sub-freezing temperatures.

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14y ago

Sublimation is the process whereby a solid goes directly to a gas, or vice-versa

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8y ago

This process is called evaporation.

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Q: Ice becomes a gas wihtout going through a luquid phase in what process?
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