In the synthesis of ammonia (N2 + 3H2 ⇌ 2NH3 + heat), increasing the TEMPERATURE will:
AShift equilibrium forward (more NH3 production gain)
BHave no effect on the equilibrium position at all
CShift backward (less NH3) since forward is exothermic
DCause the reaction to stop completely in chamber
Answer & Solution
Correct answer: C. Shift backward (less NH3) since forward is exothermic
Forward reaction is exothermic (+ heat). By Le Chatelier, increasing T shifts equilibrium in endothermic direction = BACKWARD (less NH3). Hence Haber process uses moderate T (~450°C) + high P + iron catalyst.
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