Is a phase change from gas to liquid?
Conversions of gases and liquids to the other state are both phase changes.
- Gas to liquid = condensation
- Liquid to gas = evaporation
The phase change for liquid to gas is vaporization, which includes evaporation and boiling. Evaporation - The change of liquid molecules on the surface of a liquid to a gas. Boiling - The change of phase at or above the boiling point of the liquid, which takes place at nucleation sites within the liquid.
A phase change. A phase change is a physical change that occurs when an object changes from one state to another i.e. liquid to gas, gas to liquid, liquid to solid, solid to liquid. A substance need not go through the liquid phase to change from a solid to a gas, as in sublimation of dry ice (solid carbon dioxide).
Changes in state are called phase transitions. Each of the phase transitions has a technical name and many have common names. The change from solid to liquid is fusion (or melting). The change from liquid to solid is solidification (or freezing). The change from liquid to gas is vaporization (or boiling). The change from gas to liquid is condensation. The change from solid to gas is sublimation.