The liquid to gas transition is a vaporization process and the heat required is the heat of vaporization (heat of boiling). Both the gas to solid and the gas to liquid processes are condensation ...

When a gas cools down, it can change state back into a liquid. So when the warm steam hits the surface of, say, a cold mirror it turns back into water again. This change is called condensation.

Condensation happens when warm air collides with cold surfaces - such as your window - which causes liquid droplets to ... your home during the winter, for example by upgrading to double glazed ...