This interactive diagram illustrates the phase behavior of a binary azeotropic mixture. Use the sliders and radio buttons above to customize the properties of the two components and the azeotrope.

• The Liquid Phase (Boiling Point Curve) shows the boiling temperature of the liquid mixture at different compositions of Component A.
• The Vapor Phase (Dew Point Curve) shows the composition of the vapor in equilibrium with the boiling liquid at that temperature.
• The Azeotropic Point (purple dot) is the unique composition where the liquid and vapor phases have identical mole fractions. At this point, the mixture boils at a constant (minimum or maximum) temperature and cannot be separated by simple distillation.

Mole fraction of Component A on the X-axis. Component B is (1 – Mole fraction of A).

*This is a simplified conceptual simulation using empirical functions, not derived from rigorous thermodynamic models (e.g., Raoult’s Law with activity coefficients). It is designed to illustrate the qualitative behavior of azeotropes.*