Essential Chemistry for IGCSE - Atoms, Elements And Compounds (Section 1 - No. 29)
What is the difference between a physical and a chemical change?
A physical change alters the form or appearance, not the composition
A chemical change alters the composition of the substance, creating new substances.
Physical changes always involve a chemical reaction.
Chemical changes always involve a change of state (solid, liquid, gas).
Explanation
Physical changes affect appearance. Chemical changes produce new substances.
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