PCl5( g)⇌PCl3( g)+Cl2( g)\mathrm{PCl}_{5}(\mathrm{~g}) \rightleftharpoons \mathrm{PCl}_{3}(\mathrm{~g})+\mathrm{Cl}_{2}(\mathrm{~g})PCl5( g)⇌PCl3( g)+Cl2( g)
N2( g)+O2( g)⇌2NO(g)\mathrm{N}_{2}(\mathrm{~g})+\mathrm{O}_{2}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NO}(\mathrm{g})N2( g)+O2( g)⇌2NO(g)
N2( g)+3H2( g)⇌2NH3( g)\mathrm{N}_{2}(\mathrm{~g})+3 \mathrm{H}_{2}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NH}_{3}(\mathrm{~g})N2( g)+3H2( g)⇌2NH3( g)
2SO3( g)⇌2SO2( g)+O2( g)2 \mathrm{SO}_{3}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{SO}_{2}(\mathrm{~g})+\mathrm{O}_{2}(\mathrm{~g})2SO3( g)⇌2SO2( g)+O2( g)
