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If we have a reaction and the total bond energy is 5605 kj/ mol for the...

If we have a reaction and the total bond energy is 5605 kj/ mol for the reactants and 6900 kj/mol for the products, how do we callculate the overall energy? also is this endothermic or exothermic?

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Answer #1

bond energy for the reactants = 5605 kj/ mol

bond energy for the products = 6900 kj/mol

overall energy = bond energy of reactants - bond energy of products

                        = 5605 - 6900

                        = - 1295 kJ /mol

here overall energy is negative. so this is exothermic reaction.

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