The Haber process generates ammonia from nitrogen and hydrogen gas, and nitrogen gas is the excess reagent.
What is stoichiometry?
Stoichiometry of reaction tells about the relative amount of reactants and products after and before the chemical reaction.
Given chemical reaction is:
N₂ + 3H₂ → 2NH₃
From the stoichiometry of the reaction it is given that:
1 mole of N₂ = produce 2 moles of NH₃
3 moles of H₂ = produce 2 moles of NH₃
1 moles of H₂ = produce 2/3=0.66 moles of NH₃
So, nitrogen is present in the excess quantity.
Hence, nitrogen gas is the excess reagent.
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