If enthalpy of atomisation for
Question:

If enthalpy of atomisation for $\mathrm{Br}_{2(1)}$ is $x \mathrm{~kJ} / \mathrm{mol}$ and bond enthalpy for $\mathrm{Br}_{2}$ is $\mathrm{y} \mathrm{kJ} / \mathrm{mol}$, the relation between them :

1. is $x=y$

2. is $x<y$

3. does not exist

4. is $x>y$

Correct Option: , 4

Solution: