Deposition (phase transition)

One example of deposition is the process by which, in sub-freezing air, water vapour changes directly to ice without first becoming a liquid.

Even though the air temperature may be below the dew point, the water vapour may not be able to condense spontaneously if there is no way to remove the latent heat.

Soot molecules rise from the fire in a hot and gaseous state.

The process is made use of industrially in combustion chemical vapour deposition.

There is an industrial coating process, known as evaporative deposition, whereby a solid material is heated to the gaseous state in a low-pressure chamber, the gas molecules travel across the chamber space and then deposit to the solid state on a target surface, forming a smooth and thin layer on the target surface.