${\left(2 \mathrm{NaN}_{3} \stackrel{4}{\longrightarrow} 2 \mathrm{Na}+3 \mathrm{N}_{2}\right)}$

${\left(\mathrm{Ba}\left(\mathrm{N}_{3}\right)_{2} \stackrel{\Delta}{\longrightarrow} \mathrm{Ba}+3 \mathrm{N}_{2}\right)}$

Haber process $\Rightarrow$ Formation of Ammonia

$\left(\mathrm{N}_{2}+3 \mathrm{H}_{2} \rightleftharpoons 2 \mathrm{NH}_{3}\right)$

Contact process $\Rightarrow$ manufacture of $\mathrm{H}_{2} \mathrm{SO}_{4}$

Deacon's process $\Rightarrow$ Formation of $\mathrm{Cl}_{2}$ gas $\left(\mathrm{HCl}+\mathrm{O}_{2(\mathrm{Atmosphere})} \stackrel{\mathrm{cucl_2}}{\longrightarrow} \mathrm{H}_{2} \mathrm{O}+\mathrm{Cl}_{2}\right)$