Prediction and correlation of accurate value of excess molar volume VE are of
great interest for adequate design of industrial process and for theoritical
purpose.Soave RedlichKwong (SRK-EOS), Peng-Robinson (PR-EOS), and Peng-
Robinson-Stryjek-Vera (PRSV-EOS) are selected.Five Mixing Rules are applied
on different groups systems of different polarity which are: Conventional Mixing
Rules, Quadratic Mixing Rules, Adachi and SugieMixing Rules,a modified Adachi
and Sugie mixing rules. Another tried method to extend the applicability of CEOS
by usingthe best applicable EOS from the three selected EOS with the PRSV-EOS
with a new correlation method thatuses Excess Gibbs free energy (GE) and Huron-
Vidal Method.Also by means of using Huron-Vidal Mixing Rules (HV) .the
Huron-Vidal Method is developed by using an adjustable parameter hij.The
developed applied method gave very acceptable results for binary mixtures. To find
the applicability of the gated constant for different group families; same constants
of the binaries which confirm the ternary system are quite well applicable to
calculate VE data for ternary system with very reasonable accuracy.