4381. The molar excess Gibbs free energy, gE, for a binary liquid mixture at T and P is given by, (gE/RT) = A . x₁. x₂, where A is a constant. The corresponding equation for ln y₁, where y₁ is the activity co-efficient of component 1, is September 7, 2025 by Admin A. A . x₂² B. Ax₁ C. Ax₂ D. Ax₁² ✅ The correct answer is option A.