What happens when a nonreactive gas is added to an equilibrium system?

When a nonreactive gas is added to an equilibrium system, it does not alter the concentrations of the reactants or products that are involved in the reaction. The principle of equilibrium states that the position of equilibrium depends on the concentrations (or partial pressures) of the reactive species in the system, not on inert gases that do not participate in the reaction.

Adding an inert gas at constant volume will effectively increase the total pressure of the system, but since the partial pressures of the reactants and products remain unchanged, there is no driving force to shift the equilibrium in either direction. Therefore, the position of the equilibrium remains stable, with no net change in concentrations of the reactants and products. This is why the response indicating that there is no change in the position of equilibrium is the correct answer.