state the difference between physical changes and chemical change
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When a substance undergoes a chemical change, its molecular composition is changed entirely. Thus, chemical changes involve the formation of new substances. Physical change is a temporary change. ... A Physical change affects only physical properties i.e. shape, size, etc.
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When a substance undergoes a chemical change, its molecular composition is changed entirely. Thus, chemical changes involve the formation of new substances. Physical change is a temporary change. ... Some examples of physical change are freezing of water, melting of wax, boiling of water,
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