Question

Give technical terms for the following.

The process by which a substance changes from the gaseous state to the liquid state on cooling.

Answer 1

Condensation:

1. Condensation, is the change of the physical state of matter from the gas phase to the liquid phase.
2. Condensation is the reverse process of evaporation.
3. The state conversion from the gas phase to the liquid phase releases heat, so condensation is an example of exothermic change.
4. It is a reversible and desirable change. For example, water vapour condenses to form clouds.