Bond Energies

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Bond Energies

Energy level diagrams show if its exothermic or endothermic

In exothermic reations /\H is -ve

1) This shows an exothermic reaction- the products are at a lower energy than the reactants. The difference in height represents the energy given out in the reaction (per mole). /\H is -ve here.

2) The initial rise in the line represents the energy needed to break the old bonds. This is the activation energy,



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