N2O4( g)⇌2NO2( g)\mathrm{N}_{2} \mathrm{O}_{4}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NO}_{2}(\mathrm{~g})N2O4( g)⇌2NO2( g)
2SO2( g)+O2( g)⇌2SO3( g)2 \mathrm{SO}_{2}(\mathrm{~g})+\mathrm{O}_{2}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{SO}_{3}(\mathrm{~g})2SO2( g)+O2( g)⇌2SO3( g)
H2( g)+I2( g)⇌2HI(g)\mathrm{H}_{2}(\mathrm{~g})+\mathrm{I}_{2}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{HI}(\mathrm{g})H2( g)+I2( g)⇌2HI(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)
