Sublimation is the phase transition in which a substance changes directly from a solid to a gas without passing through the liquid state. This process occurs under specific conditions of temperature and pressure.
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Sublimation occurs when the pressure and temperature are below a substance's triple point in its phase diagram.
Common examples of sublimation include dry ice (solid CO2) turning into carbon dioxide gas and iodine crystals becoming iodine vapor.
The energy required for sublimation is known as the latent heat of sublimation.
Sublimation is an endothermic process, meaning it absorbs heat from its surroundings.
In chemistry laboratories, sublimation can be used as a purification method for certain compounds.