Question

differentiate between physical and chemical changes​

Answer 1

In a chemical change, the molecular composition of a substance completely changes and a new substance is formed. Some example of physical change are freezing of water, melting of wax, boiling of water, etc. ... In a physical change, no energy is produced. In a chemical change, energy is produced (heat, light, sound, etc.)

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Answer 2

Explanation:

In physical changes the shape size of the object will change. Physical change is reversible

In chemical changes the shape and size will not change. Chemical change is irreversible