Above what temperature does the following reaction become nonspontaneous? 2 H₂S(g)+ 3 O₂(g)→ 2 SO₂(g)+ 2 H₂O(g)ΔH = -1036 kJ; ΔS = -153.2 J/K

Question

Quizplus · Accepted Answer

The reaction becomes nonspontaneous when ΔG > 0. Using the equation ΔG = ΔH - TΔS, and setting ΔG = 0 for the threshold of spontaneity, solving for T gives T = ΔH/ΔS. Plugging in ΔH = -1036 kJ (or -1036000 J) and ΔS = -153.2 J/K, T = 6762 K. Therefore, above 6762 K, the reaction becomes nonspontaneous.

Above What Temperature Does the Following Reaction Become Nonspontaneous? 2