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State the Differences Between a Physical Change and a Chemical Change. - Chemistry

State the differences between a physical change and a chemical change.

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Solution

Property Physical change Chemical Change
Formation of new substance There are no new substan ces formed in a physical change. New substances with different properties are formed in a chemical changes.
Nature of change It is usually easy to reverse the process, thereby regaining the original substance. It is usually irreversible.
Energy Generally energy is neither absorbed nor evolved. Considerable heat energy is either absorbed or evolved when a chemical change takes place.
Mass There is no change in the mass of the substance after a physical change. Mass of a substance changes after a chemical change.
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