3.6C: Know that Bond-Breaking is an Endothermic Process and that Bond-Making is an Exothermic Process

ENDOTHERMIC AND EXOTHERMIC REACTIONS

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Whether reaction is endothermic or exothermic depends on difference between the energy needed to break bonds and the energy released when new bonds form

ENDOTHERMIC:

• If more energy is absorbed than it releases, reaction is Endothermic as more energy is absorbed to break bonds

Diagram showing the Bond-Breaking in an Endothermic Reaction


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EXOTHERMIC:

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• If more energy is released than is absorbed, reaction is exothermic as energy is released when new bonds form

Diagram showing the Bond-Making in an Exothermic Reaction