What are the four differences between physical changes and chemical changes?
Answers
Explanation:
1 Physical changes are change in which the original substance does not under goes and does not form any new substance but in chemical change are change in which original substance undergoes and form a new substance .
2 . Physical change may we both reversible or irreversible nut chemical change are irreversible .
3. Physical change cannnot be represented by an equation but chemical change can be represented .
4. In physical change a small amount of energy is involved but in chemical change a greater amount of energy is used .
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Explanation:
In a physical change the substance change its form, but does not change its chemical composition. No new substances are formed. The molecules of the substance remain exactly the same as before.
In a chemical change takes place when there is a chemical reaction between the substances. A new substance is formed. The molecules of the new substance are different from that of the original substance.