Question

Write two differences between phyical and chemical changes with two examples of each​

Answer 1

Answer:

Physical Change

1)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.

2)Physical change is a temporary change.

EXAMPLE: A Physical change affects only physical properties i.e. shape, size, etc.

CHEMICAL CHANGE

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

2)A chemical change is a permanent change.

example: chemical change are digestion of food, burning of coal, rusting, etc.