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Equilibria (Kc/Kp) a) Which statement correctly describes the effect of a catalyst on the following equilibrium? (1 mark) N2(g) + 3H2(g)=2NH3(9) A. It increases the value of the equilibrium constant. B. It increases the rate of the forward reaction but decreases the rate of the reverse reaction. C. It increases the rates of both forward and reverse reactions equally. D. It increases the yield of ammonia. b) Consider the following reversible reaction to produce ammonia: N269) + 3H2(g) =2NH3(g) ΔΗ= - 92 kJ i. The reaction is described as being at equilibrium. Explain what this means. (1 mark) ii. A mixture of 1.0 mol of N2(g) 1.0 mol of H2(g) and 1.0 mol of NH3(g) are placed in a 1.0 dm sealed container and left to reach equilibrium. At equilibrium the concentration of N2(g) is 0.8 mol dm-3. What are the equilibrium concentrations of H2(g) and NH3(g) in mol dm-3? (2 marks) iii. Write the equilibrium constant expression, Kc, for this reaction. (1 mark) iv. Calculate the equilibrium constant kc and state its units. (2 marks) What would happen to the equilibrium yield of ammonia if the pressure was increased? (1 mark) V.