2. Ammonia is produced by the Haber process, in which nitrogen and hydrogen are reacted directly using an iron mesh impregnated with oxides as a catalyst. For the reaction N2(g) + 3H2(g) = 2NH3(g) equilibrium constant (Kp values) as a function of temperature are 300 C, 4.34 x 10-3 500 C, 1.45 x 10-5 600 C, 2.25 x 10-6 (a) Is the reaction exothermic or endothermic? Explain why. (b) Calculate AH from the data using the van't Hoff equation: 1 R Is the sign of AH in your answer consistent with your answer for (a)? Hran in (K) = 6, 7)