[dijinj]

It came to me as a surprise that nitrogen has strongest bond. I learned that single bonds are strongest covalent bond. So why nitrogen having triple bonds has the strongest bond in diatomic molecules

[opti384]

It's quite the opposite. Triple bonds are actually stronger than single bonds.

[Borek]

Every bond in triple bond is weaker than a single bond, but there are three of them, and it is total strength that counts.

[MrTeo]

Every bond in triple bond is weaker than a single bond, but there are three of them, and it is total strength that counts.

Well, two bonds ($$ \pi /$$) are weaker but I think that the third ($$ \sigma /$$) has more or less the same energy of a single bond, am I wrong?

[Jorriss]

Every bond in triple bond is weaker than a single bond, but there are three of them, and it is total strength that counts.

Well, two bonds () are weaker but I think that the third () has more or less the same energy of a single bond, am I wrong?

Basically. For the purposes of this question, any C-x single bond has equal strength.

so, C-C, N-N, O-O are all 'relatively' equal.

But now, N2 has two more pi bonds on top of that single bond, while oxygen only has one pi bond enforcing it.

[dijinj]

you mean the individual bonds in a triple bond is weaker than single bonds, or only total strength of all 3 bonds in a triple bond is higher, right? so the reaction N2 + 3 H2 > 2 NH3 is exothermic, right?
is oxidation of N2 is exothermic reaction with high threshold energy? I learned that Air ignites at very high temperature.
Can you suggest a good book that deals with calculations of energies of reaction( how to find out energy released or absorbed in reaction)