distinguished between chemical change and physical change
Answers
Answer:
physical changes :-
- no new product is formed
- no change in chemical constitution
- it is mostly reversible in nature
- change in physical properties only .
- eg. boiling of water
CHEMICAL changes:-
- new products are formed
- there is a change in chemical composition
- it is non reversible in nature
- mostly change in physical properties as well
- eg. burning of coal.
Physical Change Vs Chemical Change
When a substance undergoes a physical change, its composition remains the same despite its molecules being rearranged.
When a substance undergoes a chemical change, its molecular composition is changed entirely. Thus, chemical changes involve the formation of new substances.
Physical change is a temporary change. A chemical change is a permanent change.
A Physical change affects only physical properties i.e. shape, size, etc. Chemical change both physical and chemical properties of the substance including its composition
A physical change involves very little to no absorption of energy. During a chemical reaction, absorption and evolution of energy take place.
Some examples of physical change are freezing of water, melting of wax, boiling of water, etc. A few examples of chemical change are digestion of food, burning of coal, rusting, etc.
Hope it helps you