How the Changes occur in the states of matter?

Que.: How the Changes occur in the states of matter?

Ans.:

Changes in the States of matter:

• Changes can occur in the states of matter either by heating or cooling. It can result in a physical or chemical change.

Physical change is that when only the state of the substance changes, without any change in the chemical composition.

The process in which solid changes to a liquid is called as melting.
The process in which liquid changes to a solid is called as freezing.
The process in which liquid changes to a vapour is called as evaporation.
The process in which vapour changes to a liquid is called as condensation.
The process in which solid changes to a vapour is called as sublimation.
Chemical change occurs when a substance changes into a new substance. It is indicated by change in the density, melting point of the original substance.

Que.: How the Changes occur in the states of matter?