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Differentiate between Physical Change & Chemical Change with 2 Examples . 5 marks


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Answer 1

Answer:

Some examples of physical change are freezing of water, melting of wax, boiling of water, etc.

A few examples of chemical change are digestion of food, burning of coal, rusting, etc. ...

Chemical changes usually involve the production of energy (which can be in the form of heat, light, sound, etc.)

Answer 2

Answer:

• 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.
• A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity. Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding.

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