The gaseous reaction, N2+3H2⇌2NH3,  takes place at 4500c. 1 mole of Nitrogen and 2 mole of Hydrogen are mixed in a 1 litre vessel and 1 mole of Ammonia is formed at equilibrium. Then Kc for the above reaction is

V=1 lit;N2+3H2⇌2NH31 mole of N2 gives 2 moles of NH3'X1' moles of N2 gives 1 mole of NH3Number of moles of N2 reacted = 0.51 mole of N2 reacts with 3 moles of H20.5 moles of N2 reacts with 'X2' moles of H2Number of moles of H2 reacted = 1.5  1   Kc=NH32N2H23; Kc=120.50.53=16;