Question

why n-n bond dissociation enthalpy is less than p-p bond dissociation enthalpy​

Answer 1

Answer:

N-N sigma bond is weaker than P-P sigma bond due to the small bond length between the nitrogen atoms. The non-bonding electrons(lone pair of electrons) of both the atoms repel each other making it weaker than P-P sigma bond. This is why the catenation tendency is not present in Nitrogen.

Answer 2

Answer:The n-n bond is weaker than p-p bond dissociation because of the small bind length between nitrogen atoms and the lone pair 9f both the atoms repels each other makeing weaker than p-p bond

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