What term describes the phase change from solid to gas?

The term that describes the phase change from solid to gas is sublimation. This process occurs when a solid transitions directly into a gas without first becoming a liquid. An example of sublimation is dry ice (solid carbon dioxide), which turns into carbon dioxide gas without melting into a liquid form. This phase change typically occurs under conditions of low pressure and/or high temperature, where the solid molecules gain enough energy to overcome the intermolecular forces holding them together and disperse into the gaseous state.

Condensation refers to the process where gas turns into a liquid, while evaporation is the transition of a liquid into a gas. Melting is the process of a solid becoming a liquid. These terms describe very different phase changes that do not pertain to the solid-to-gas transition.