When a liquid flashes into a vapor, solidifies, crystallizes, cokes etc.

Change from one phase, such as solid, liquid or gas, to another.

to change into either a solid, liquid or a gas

the process of a substance changing from a solid to liquid to gas or vice versa.

change of matter from one state (gas, liquid, solid) to another.

The three states of matter are: water, liquid, gas. A change of state occurs when the substance shifts from one state to another.

The process whereby liquid is heated to the point of evaporation changing the liquid into a gas the condensation of a gas on a cooler surface returning it from gaseous to liquid form.

The rearrangement of the molecular structure of matter as it changes from one physical state to another (solid, liquid or gas). Also called a "phase" change.