Essential Chemistry for IGCSE - Chemical Reactions (Section 5 - No. 37)
What happens to the equilibrium position if an inert gas (e.g., helium) is added to a gaseous equilibrium at constant volume?
The equilibrium shifts to the right.
The equilibrium shifts to the left.
The equilibrium remains unchanged.
The reaction rate becomes zero.
Explanation
Adding an inert gas at constant volume does not change the partial pressures of the reactants or products, and therefore does not affect the equilibrium position.
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