The industrial synthesis of ammonia is represented by the balanced equation
N₂(g) + 3 H₂(g) → 2 NH₃(g)
At 298 K the standard entropy change for the reaction is ΔS°₍rxn₎ = −198.0 J mol⁻¹ K⁻¹. The standard molar entropies of the reactants are listed below.
Substance S°(298 K)
N₂(g) 191.5 J mol⁻¹ K⁻¹
H₂(g) 130.7 J mol⁻¹ K⁻¹
(a) Calculate the standard molar entropy of NH₃(g) at 298 K.
(b) Discuss how your calculated value supports or contradicts the common assertion that the Haber process leads to a more ordered system of particles.