Question

Sublimation is a __________ change.

Answer 1

Sublimation: The process of conversion of a substance from the solid-state into the gaseous state on heating directly without converting into the liquid state.

• Example: Camphor, Naphthalene, Anthracene
• $\mathrm{Camphor}\left(\mathrm{s}\right)\underset{\mathrm{Cool}}{\overset{\mathrm{Heat}}{\rightleftarrows }}\mathrm{Camphor}\left(\mathrm{g}\right)$

Sublimation is a physical change as a substance only changes its physical state without the formation of a new substance or undergoing any change in its chemical composition or chemical properties.

Physical change: A change in which no new substance is formed and there is no change in the chemical composition of the substance undergoing the change.

Therefore, sublimation is a physical change.