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What is the effect of temperature, pressure and catalyst on ammonia synthesis process?

What is the effect of temperature, pressure and catalyst on ammonia synthesis process?

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Answer #1

The Ammonia synthesis reaction is

N2(g) + 3H2(g) = 2NH3(g)

Effect of temperature

H = - 92 kJ/mol

This reaction is exothermic

From the Le Chatelier's Principle, to produce more NH3 low temperature favors the forward reaction.

Effect of pressure

Moles of reactants (4) > moles of products (2)

From the Le Chatelier's Principle, increase the pressure will yield the maximum amount of NH3

Effect of catalyst

catalyst is used to speed up the reaction rate. It does not effect the equilibrium and yield of the NH3.

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