A change in energy takes place when a physical or a chemical change occurs. Give example of changes which takes place when heat is evolved or absorbed.
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— All chemical reactions involve changes in energy. ... Describe how heat is transferred in endothermic and ... energy changes taking place during a reaction, we need to ....
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A chemical change result from a chemical reaction while a physical change is when matter change from but not chemical identity example of chemical change are burning, cooking, rusting and routing example of physical change or boiling melting ,freezing and shredding
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