For the synthesis equilibrium N2(g)+3H2(g)⇌2NH3(g)ΔH=−92kJ consider the following single changes that could be made to a system initially at equilibrium:
(i) decrease the temperature,
(ii) increase the volume of the reaction vessel,
(iii) continuously remove NH3 as it forms.
Which one of these changes alone would produce the greatest increase in the equilibrium yield of NH3? Briefly justify your choice.