N2( g)+3H2( g)=2NH3( g)\mathrm{N}_{2}(\mathrm{~g})+3 \mathrm{H}_{2}(\mathrm{~g})=2 \mathrm{NH}_{3}(\mathrm{~g})N2( g)+3H2( g)=2NH3( g)
PCl5( g)=PCl3( g)+Cl2( g)\mathrm{PCl}_{5}(\mathrm{~g})=\mathrm{PCl}_{3}(\mathrm{~g})+\mathrm{Cl}_{2}(\mathrm{~g})PCl5( g)=PCl3( g)+Cl2( g)
I2( g)+H2( g)⇌2HI(g)\mathrm{I}_{2}(\mathrm{~g})+\mathrm{H}_{2}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{HI}(\mathrm{g})I2( g)+H2( g)⇌2HI(g)
N2O4( g)2NO2( g)\mathrm{N}_{2} \mathrm{O}_{4}(\mathrm{~g}) 2 \mathrm{NO}_{2}(\mathrm{~g})N2O4( g)2NO2( g)