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Which mechanism causes equilibrium shift in Haber-Bosch process at constant volume when inert gas is added?

A)Partial pressure dilution keeps equilibrium
B)Reaction rate increase favors products
C)Temperature decrease slows attainment
D)Total pressure increase no shift

💡 Explanation

Adding inert gas at constant volume does not change the partial pressures of the reactants and products, so Le Chatelier's principle predicts no shift in equilibrium because activities remain unchanged. Therefore total pressure increase has no impact, rather than dilution, increased reaction rate, or temperature effects each requiring activity changes.

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