A mixture of (1.57 ~mol ) of ( N 2,1.92 ~mol ) of ( H 2 ) and (8.13 ~mol ) of ( NH 3 ) is introduced into a (20 ~L ) reaction vessel at (500 ~K ). At this temperature, the equilibrium constant, (K_c ) for the reaction: (N 2(g)+3 H 2(g) 2 N H 3(g) ) is (1.7 10^2 ). Is the reaction mixture at equilibrium? If not, what is the direction of the net reaction?