Meaning | Physical change refers to a change in which the molecules are rearranged but their internal composition remains same. | Chemical Change is a process in which the substance transforms into a new substance, having different chemical composition. |
Example | Tearing of paper, melting/freezing of water, cutting of trees, etc. | Burning of wood/trees/paper, rusting of iron, setting of curd, etc. |
Nature | Reversible | Irreversible |
Original matter | Can be recovered | Cannot be recovered |
Involves | Change in physical properties of the substance, i.e. shape, size, color etc. | Change in chemical properties and composition of the substance. |
Product Formation | No new product is formed. | New product is formed. |
Energy | Absorption and evolution of energy do not take place. | Absorption and evolution of energy take place, during reaction. |