N2O4(g)= 2NO2(g), what would happen if: more NO2 is added to the system?

Answer 1

Le Chatelier's principle states that if a stress is applied to a system at equilibrium, the system will shift to counteract the stress and restore equilibrium.

In this case, adding more NO2 would increase the concentration of NO2 in the system. According to the equilibrium equation N2O4(g) <=> 2NO2(g), increasing the concentration of NO2 would shift the equilibrium to the left to consume some of the excess NO2. This would lead to an increase in the concentration of N2O4 and a decrease in the concentration of NO2 until a new equilibrium is established.