The change in state from solid to gas is called which process?

The change in state from solid to gas is called which process?

• A. Evaporation
• B. Sublimation
• C. Condensation
• D. Melting

Answer: (B)

The change from a solid directly into a gas is sublimation. This happens when solid particles gain enough energy to break free from the rigid lattice and enter the gas phase without first becoming liquid. It often occurs under low pressure or with substances that have high vapor pressure at relatively low temperatures, such as dry ice (solid carbon dioxide) at room temperature. Sublimation is different from melting, which is solid to liquid, and evaporation, which is liquid to gas. It’s also different from condensation, which is gas to liquid. In sublimation, no liquid forms at any point.

The change from a solid directly into a gas is sublimation. This happens when solid particles gain enough energy to break free from the rigid lattice and enter the gas phase without first becoming liquid. It often occurs under low pressure or with substances that have high vapor pressure at relatively low temperatures, such as dry ice (solid carbon dioxide) at room temperature.

Sublimation is different from melting, which is solid to liquid, and evaporation, which is liquid to gas. It’s also different from condensation, which is gas to liquid. In sublimation, no liquid forms at any point.