The following data is available for a binary mixture of components (1) and (2) at T = 308.15 K: -
1. Saturation pressures of pure components: P₁ˢᵃᵗ = 49.624 kPa ; P₂ˢᵃᵗ = 85.265 kPa
2. The following equations are valid to determine the activity coefficients of each component in the liquid phase:
In(y₁) = x₂² [A₁₂ + 2(A₂₁ – A₁₂ – C)x₁ + 3Cx₁²]
In(y₂) = x²₁[A₂₁ + 2(A₁₂ – A₂₁ – C)x₂ + 3Cx₂²]
3. With the following parameter values: A₁ = -0.264 ; A₂₁ = -0.421; C = 0.23
4. The liquid phase is in equilibrium with a vapor phase, which can be assumed to be an ideal gas
(a) A system forms an azeotrope if xı =yı at any given T and P. Does this system form an azeotrope at T= 308.15 K? If so, what is the composition xı =yı of the azeotrope?