Explanation :
Bond length : It is defined as the average distance present between the nuclei of two bonded atoms in the molecule.
Bond energy : It is defined as the amount of energy required to break the molecules into its components atoms.
And bond energy is inversely proportional to the bond length.
[tex]\text{Bond energy}\propto \frac{1}{\text{Bond length}}[/tex]
If the more number of bonds are formed between the atoms, that means the bond strength of that bond will be more or the bond length will be less and the bond energy will be more.
- Thus, single bond will have the highest bond length and lower bond energy.
- Then, double bond has the lowest bond length than the single bond length and higher bond energy than the single bond energy.
- Then, triple bond has the lowest bond length than the double bond length and higher bond energy than the double bond energy.
Order for bond length follows :
[tex]C-C>C=C>C\equiv C[/tex]
Order for bond energy follows :
[tex]C-C<C=C<C\equiv C[/tex]
The complete table of bond energies and bond lengths are shown below.
