Prediction of excess molar volumes of binary mixtures by Prigogine-Flory-Patterson (PFP) and extended real association solution (ERAS) models

Abstract

In this paper, the Prigogine–Flory–Patterson (PFP) theoretical model and the extended real association solution (ERAS) model for the prediction of the excess molar volumes of 17 binary sets of alcohols (methanol, ethanol, propan-1-ol, butan-1-ol, butan-2-ol and pentan-1-ol) with benzene, chlorobenzene, acetonitrile, hexan-1-amine and n-heptane were tested at 298.15 K and atmospheric pressure. The binary sets contained 333 experimental data points for 11 different compounds. The ERAS model demonstrated better correlative characteristics for binary mixtures comparing to PFP model. The ERAS model is successfully applied on all binary systems except ethanol + benzene and propan-1-ol + benzene. PFP model gave less satisfactory results for all systems except butan-1-ol + hexan-1-amine, for which obtained results were acceptable. [Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. 172063]

Keywords

• binary mixtures
• excess molar volume
• prediction model
• PFP
• ERAS