Question:
If enthalpy of atomisation for $\mathrm{Br}_{2}(\mathrm{I})$ is $x \mathrm{~kJ} / \mathrm{mol}$ and bond enthalpy for $\mathrm{Br}_{2}$ is $y \mathrm{~kJ} / \mathrm{mol}$, the relation between them:
Correct Option: , 3
Solution:
$\Delta \mathrm{H}_{\text {atomisation }}=\Delta \mathrm{H}_{\text {vap }}+$ Bond energy
Hence $x>y$