Hydrogen sulfide decomposes according to the following reaction: 2H₂S(g) → 2H₂(g) + S₂(g)
For this reaction at 298 K, ΔS°_rxn = 78.1 J/K • mol, ΔH°_rxn = 169.4 kJ/mol, and ΔG°_rxn = 146.1 kJ/mol. What is ΔG°_rxn at 900. K?

Question

Quizplus · Accepted Answer

To find ΔG° at 900 K, use the equation ΔG° = ΔH° - TΔS°. Convert ΔH° to J/mol (169.4 kJ/mol = 169400 J/mol) and use T = 900 K. ΔG° = 169400 J - (900 K)(78.1 J/K•mol) = 169400 J - 70290 J = 99110 J/mol = 99.1 kJ/mol.

Hydrogen Sulfide Decomposes According to the Following Reaction: 2H2S(g) →

Hydrogen Sulfide Decomposes According to the Following Reaction: 2H₂S(g) →