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A mixture of 1.57 mol of N2, 1.92 mol of H2 and 8.13 mol of NH3 is introduced into a 20 L reaction vessel at 500 K. At this temperature, the equilibrium constant, Kc for the reaction 

Is the reaction mixture at equilibrium? If not, what is the direction of the net reaction

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The given reaction is: 

Now, reaction quotient Qc is: 

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

Again, Qc > Kc . Hence, the reaction will proceed in the reverse direction.

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