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Equilibrium constant, Kc for the reaction at 

        500 K is 0.061. 

At a particular time, the analysis shows that composition of the reaction mixture is 3.0 mol L –1 N2, 2.0 mol L–1 H2 and 0.5 mol L–1 NH3. Is the reaction at equilibrium? If not in which direction does the reaction tend to proceed to reach equilibrium? 

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The given reaction is: 

Now, we know that, , 

Since    Qc ≠  Kc  the reaction is not at equilibrium. ,

Since    Qc < Kc  the reaction will proceed in the forward direction to reach equilibrium. 

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