Change of state of matter

Change of state of matter

We can change the physical state of matter in two ways:

• By changing the temperature, and
• By changing the pressure.

Solid to Liquid Change: Melting

The process, in which a solid substance changes into a liquid on heating, is called melting (or fusion).

Liquid to Gas Change: Boiling (or Vaporization)

Place during boiling. The boiling of a liquid takes place at a fixed temperature. The temperature, at which a liquid boils and changes rapidly into a gas at atmospheric pressure, is called boiling point of the liquid.

When a liquid is heating, it changes its physical state and becomes a gas.

Gas to Liquids Change:- Condensation

The process of changing a gas to liquid by cooling is called condensation.

Liquid to Solid Change: Freezing 

The process of changing a liquid into a solid by cooling is called freezing.

When a liquid is cooled its particles lose energy due to which they move slowly.  At this stage the liquid freezes and becomes a solid.