Question

List two differences between physical and chemical changes.
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Answer 1

Answer:

Physical change can be reversed but chemical change can not be reversed.

Answer 2

Answer:

The difference between a physical reaction and a chemical reaction is composition.

Explanation:

In a chemical reaction, there is a change in the composition of the substances in question; in a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition.

Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.

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