Describe in detail the relationship between chemical bonds and energy. What must be true of the bonds for a reaction to be endothermic, and what must be true for the reaction to be exothermic?

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18-04-2017
Chemistry

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Describe in detail the relationship between chemical bonds and energy. What must be true of the bonds for a reaction to be endothermic, and what must be true for the reaction to be exothermic?

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patitosegura7 patitosegura7 · Answer 1 · 2017-04-18T21:05:09+02:00

Any time that a bond is formed, energy is released. Likewise, any time that a bond is broken, energy must be supplied.

In an endothermic reaction, the energy required to break the bonds in the reactants must be greater than the energy released forming the bonds in the product.

For an exothermic reaction, the opposite will be true: More energy is released in forming the bonds of the product than is absorbed to break the bonds in the reactants.