Dissociation energy of N2 is very high. Why?

Question

Dissociation energy of N2 is very high. Why?

Answer 1

N2 has a triple bond. it takes more energy for a triple bonded elemnt to dissociate than element w/ one even two bonds.

Answer 2

This is because in N2 molecule two N atoms are linked together by very strong 2 sigma bonds and one pi bond i.e. by triple bonds.

Answer 3

because all the electrons are extremely happy, the outer shell of electrons are full because of shareing between the two N atoms.

Answer 4

The nitrogen molecule has a "triple" bond between them. Bonding energies go up as the # of bonds go up.

The MCAS model gives a different explanation. In this model, there is much less repulsion between the bonding electrons and the non-bonding electrons. As more electrons are added to the non-bonding orbitals there is more repulsion and the bond strength go down. Thus, N2 appears with "triple" bond strength, O2 as "double" and F2 as "single" without any actual difference in bonding!