Which of the following gaseous equilibrium systems will shift in the forward direction when an inert — Chemical Equilibrium Chemistry Question

💡 Solution & Explanation

Adding an inert gas at constant pressure increases the total volume of the system. This decreases the molar concentration (moles/volume) of all reacting species. The system compensates by shifting towards the side with a greater number of gaseous moles ($\Delta n_g > 0$). Reaction A ($\Delta n_g = 1$) and C ($\Delta n_g = 2$) will shift forward.