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If energy is stored in chemical bonds, and bond formation is always an exothermic process, doesn't that imply that bond formation both stores and releases energy? How is this possible? I'm clearly not understanding some basic tenet of chemistry. For example, H+ and OH- neutralize to form H2O.
Asker's rating. 1  Bond breaking is endothermic because you are putting energy in (usually in the form of heat) 2  heat is released to the environment (the system) in an exothermic reaction. 3  The breaking of bonds always involves the absorption of energy (conversely the formation of bonds always releases energy) 4  absorbed endo.