If more energy is required to break the bonds in the reactants than to make the bonds in the products, is the reaction exothermic or endothermic?

1 year ago


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Yasmin Dicki

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It's an endothermic reaction. It's because breaking bonds absorbs energy and making bonds releases energy to the surrounding. Total energy change = Energy required to break bonds - Energy released making bonds. If more energy is absorbed than released, that means the overall energy change is positive --> endothermic.

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