The following data is available for a binary mixture of components (1) and (2) at T = 308.15 K:
- Saturation pressures of pure components: P₁ˢᵃᵗ = 49.624 kPa ; P₂ˢᵃᵗ = 85.265 kPa
- The following equations are valid to determine the activity coefficients of each component in the liquid phase:
In(y₁) = xị[A₁₂ + 2(A₂₁ – A₁₂ – C)x₁ + 3Cxz²₁]
In(y₂) = x[A₂₁ + 2(A₁₂ – A₂₁ – C)x₂ + 3Cxz²₂]
With the following parameter values: A₁₂ = -0.264 ; A₂₁ = -0.421; C = 0.23
- The liquid phase is in equilibrium with a vapor phase, which can be assumed to be an ideal gas
A system forms an azeotrope if x₁ =y₁ at any given T and P. Does this system form an azeotrope at T= 308.15 K? If so, what is the composition x₁ =y₁ of the azeotrope?
