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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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2w ago

Sublimation is the process in which a substance transitions directly from a solid to a gas without passing through the liquid phase. This can happen with ice turning into water vapor at low temperatures and pressures.

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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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Liquid water has its maximum density at 4 degrees Celsius. At this temperature, water molecules are densely packed, causing the water to be the most compact, which is why ice forms on the surface of bodies of water at this temperature.


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