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N2O4 ⇔ 2NO2      ...

N2O4 ⇔ 2NO2          (Δ = -ve)

From the reaction above, which of these conditions would produce the highest equilibrium yield for N2O4?

A.

Low temperature and high pressure

B.

Low temperature and low pressure

C.

high temperature and low pressure

D.

high temperature and high pressure

Correct answer is D

high temperature and high pressure favor the highest yield for N2O4

high temperature favours the production of the reactant since it is endothermic, while high pressure favours the side involving a decrease in volume.