UNIFAC model

The UNIFAC model (Universal Quasichemical Functional-group Activity Coefficients) predicts how different chemical substances mix and separate, especially in liquids. It considers the molecular structure by dividing molecules into groups (like parts of a Lego set) and uses data about how these groups interact. This helps estimate properties like how well substances dissolve in each other without experimental testing. It's widely used in chemical engineering to design processes such as solvent selection and separation, making it a valuable tool for understanding and predicting mixture behaviors efficiently and accurately.