Write three differences between physical changes and chemical changes?
Answers
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Explanation:
The comparisons and differences between physical and chemical changes are given below along with their examples.
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Differences Between Physical and Chemical Change.
I)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.
ii) Physical change is a temporary change.
A chemical change is a permanent change.iii)Physical change affects only physical properties i.e. shape, size, etc. Chemical change both physical and chemical properties of the substance including its composition
IV) A physical change involves very little to no absorption of energy. During a chemical reaction, absorption and evolution of energy take place.