The reaction of ammonia and hydrogen chloride produces ammonium chloride as shown:
NH₃ (g) + HCl (g) →NH₄Cl (s) If D H D S < O, then what can be stated about this reaction?

Question

The reaction of ammonia and hydrogen chloride produces ammonium chloride as shown: NH₃ (g) + HCl (g)→NH₄Cl (s) If D H D S < O, then what can be stated about this reaction?

Quizplus · Accepted Answer

Given that ΔH < 0 and ΔS < 0, the reaction is exothermic and leads to a decrease in entropy. According to the Gibbs free energy equation ΔG = ΔH - TΔS, the reaction is more likely to be spontaneous at lower temperatures where the negative ΔH dominates, and non-spontaneous at higher temperatures where TΔS (negative in this case) can lead to a positive ΔG.

The Reaction of Ammonia and Hydrogen Chloride Produces Ammonium Chloride