Prediction of excess volumes of ternary liquid mixtures

Considering a ternary liquid mixture to be made up of three binary mixtures, Flory's statistical theory has been extended to obtain a relation for the excess volume. In the light of above extension, the excess volumes of 15 different ternary liquid mixtures have been predicted at 25 and 30 °C over a wide range of composition. There is excellent agreement between the experimental and theoretical excess volumes, both in magnitude and sign.