For a particular reaction, Δ H ∘ = − 28.4 kJ/mol ΔH∘=−28.4 kJ/mol and Δ S ∘ = − 87.9 J / (mol ⋅ K). ΔS∘=−87.9 J/(mol⋅K). Assuming these values change very little with temperature, at what temperature does the reaction change from nonspontaneous to spontaneous in the forward direction?