Sublimation Process and Applications Quiz

Sublimation Process

• Sublimation is the transition of a substance from the solid to the gas phase without going through the liquid phase.
• It occurs when the intermolecular forces between molecules are weak, allowing them to change directly from solid to gas.

Substances that Undergo Sublimation

• Iodine (I₂) is a common example of a substance that undergoes sublimation at standard pressure.
• Dry ice (frozen carbon dioxide) also sublimes at standard pressure.

Temperature during Sublimation

• During sublimation, the temperature of the substance remains constant, as heat energy is used to break the intermolecular forces, rather than to increase the temperature.

Applications of Sublimation

• One application of sublimation is in the production of frozen carbon dioxide (dry ice), which is used as a refrigerant and in cryogenic applications.
• Another application is in the preservation of food, where sublimation can be used to freeze-dry foods, removing moisture and preserving their structure and nutrients.