why would exothermic reaction involve stronger bonds in the products than in the reactants? and why would endothermic reaction involve weaker bonds in the products than in the products?

Question

aaronq · Answer

exothermic reactions produce compounds with bonds that are stronger because they are more stable (meaning less reactive)

anonymous · Answer

so if I ask why, what would the answer be?

aaronq · Answer

sorry i didn't see this till now....  well i pretty much said i before, let me add more details.."because exothermic reactions (delta G = negative, spontaneity) yield products that are more stable (meaning less reactive meaning lower in energy as some of the energy from the bonds is released as heat) and thus infer "stronger" bonds" stronger. if you had a specific example you could apply molecular orbital theory and find the specific bond orders of the products, which will be larger (more positive) than the reactants.

aaronq · Answer

the reverse could be applied to answer the latter question

aaronq · Answer

the lower energy in the bonds is due to the electronic configuration in the atoms (occupation of bonding, non bonding, or anti bonding mo's)