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What is bond energy? How are the bond en...

What is bond energy? How are the bond energies related to change in enthalpy of a reaction?

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Bond energy is the amount of energy required to dissociate one moleof bonds present between the atoms in the gaesous molecules. As the molecules dissociate completely into atoms in the gaseous state, therefore, bond energy of a diatomic molecule is called enthalpy of atomisation.
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