# What is the change in state from a liquid to a gas called?

$\text{Vaporization}$
This is the phase transition between a liquid and a gas; whereas the reverse transition is $\text{condensation}$. Usually all liquids have an equilibrium vapour pressure, which is an measurement of the evaporation of the liquid. When the vapour pressure of the liquid is $1 \cdot a t m$, the $\text{normal boiling point}$ is described; i.e. the vaour pressure of the lquid is equal to the ambient pressure, and bubbles of vapour form directly in the liquid.