The total bonding energy for the products of a reaction is 1230 kj/mol and the bonding energy of the reactants is 565 kj/mol. calculate the change in enthalpy, and classify the reaction as endothermig or exothermic. -665 kj/mol, endothermic 665 kj/mol, exothermic -665 kj/mol, exothermic 665 kj/mol, endothermic