The haber process is typically carried out at a temperature of approximately 500°c. what would happen to the rate of the forward reaction if the temperature were lowered to 100°c? the reaction rate would

Answer is: the reaction rate would decrease.

The lower is the temperature, the slower the reaction becomes.
The Haber process is procedure for the production of ammonia, in this process atmospheric nitrogen (N₂) is converted to ammonia (NH₃):
N₂ + 3H₂ ⇄ 2NH₃ ΔrH = -92 kJ/mol.
Because this is exothermic reaction (enthalpy is less than zero), at lower temperatures, the equilibrium is in favor of ammonia, but the reaction doesn't proceed at a detectable rate.

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