Formation of $\mathrm{O}_{3}$ from $\mathrm{O}_{2}$ is\

Question

Professor PC Thomas Classes · Answer

$3 \mathrm{O}_{2} ightarrow 2 \mathrm{O}_{3}: \Delta \mathrm{H}=+142 \mathrm{~kJ} / \mathrm{mol}$\