What is the difference between physical change and chemical change?

In physical change only the physical properties like shape will change and chemical compositions remains same while in chemical change, chemical reaction takes place and the whole composition of that matter get changed.

Explanation:

Physical Change

The changes that occur only due to change in shape or form but their chemical or internal composition remain unchanged.

These changes were reversible.

They have same chemical property.

These changes can be observed with naked eye.

Example

Water converting to Ice.

Water converting to gas.

In this water molecule remain the same, only they rearrange themselves that change its state of mater not composition

Chemical:

The changes, that occur due to change in the composition of a substance and result in a different compound is known as chemical change.

These changes are irreversible.

These changes occur due to chemical reactions.

These may not be observed with naked eye.

Example:

Combustion of fuel or wood: that oil or wood convert into energy, CO2 and ash in case of wood

Boiling of egg: that change the chemical composition of protein in the egg

The reaction of Hydrogen and oxygen:

H 2 (g) + O 2 (g) > 2H 2O (l)

the cold front replaces the warmer air at the ground level changing the wind to be breezy and denser.there is also an immediate drop in the temperature.