Question

The process through which a solid directly changes to a gaseous state without passing through a liquid state is called _________.

Answer 1

Sublimation

• Sublimation is the change of a solid-state directly to the gaseous state without going through the liquid state.
• It is an endothermic process.

Examples of sublimation

• Ammonium chloride$\left({\mathrm{NH}}_4\mathrm{Cl}\right)$, dry ice (frozen ${\mathrm{CO}}_2$), and naphthalene $\left({\mathrm{C}}_{10}{\mathrm{H}}_8\right)$ are examples of the sublime substances which undergo sublimation.
  

Hence, the process through which a solid directly changes to a gaseous state without passing through a liquid state is called sublimation.