Question: 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.

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 constants (Kp values) as a function of temperature are 300oC, 4.34 × 10-3 500oC, 1.45 × 10-5 600oC, 2.25 × 10-6 Is the reaction exothermic or endothermic?

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