If the system 3H₂(g) + N₂(g) 2NH₃(g) is at equilibrium and more N₂ is added, a net reaction that consumes some of the added N₂ will occur until a new equilibrium is reached.

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Le Chatelier's principle states that a system at equilibrium will respond to any stress by shifting the equilibrium in the direction that counteracts the stress. In this case, adding more N₂ is a stress on the system, and the system will respond by shifting the equilibrium to consume some of the added N₂ to form more product. This will continue until a new equilibrium is reached where the rates of the forward and reverse reactions are equal once again.

If the System 3H2(g) + N2(g) 2NH3(g) Is at Equilibrium

If the System 3H₂(g) + N₂(g) 2NH₃(g) Is at Equilibrium