Physical and Chemical Change — CHEMISTRY STD 7 — Question
ICSE BoardEnglish MediumSTD 7CHEMISTRYPhysical and Chemical Change1 Mark
Question
Chemical changes are accompanied by changes in energy.
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Answer
In a chemical change, molecules and atoms rearrange themselves to form new substances. This rearrangement involves some energy changes. It can either be absorption or evolution of energy.
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