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 \(N_2 (g) + 3H_2 (g) ⇋ 2NH_3\) (g) is 1.7 × 102. Is the reaction mixture at equilibrium? If not, what is the direction of the net reaction?