Question

State three difference between a physical change and chemical change.​

Answer 1

Answer:

1. Physical Change

=> Physical change is a temporary change.

=> When a substance undergoes a physical change, its composition remains the same despite its molecules being rearranged.

=> A physical change involves very little to no absorption of energy.

2. Chemical change

=> A chemical change is a permanent change.

= > When a substance undergoes a chemical change, its molecular composition is changed entirely. Thus, chemical changes involve the formation of new substances.

=> During a chemical reaction, absorption and evolution of energy take place.

Explanation:

I hope it helps you.

Answer 2

Answer:

Physical change is mostly reversible but it is not so in the case of chemical change .

Physical change do not form a new substance with totally different chemical properties but in the case of chemical change a chemically different product is always derived.

Physical Changes sometimes occur with the application of heat or sometimes cooling is done but chemical changes always involve the role of energy in some or another form .

example of physical change is melting of ice while example of chemical change is digestion of food .

hope it helps u .