Excess Molar Enthalpies of the Ternary System {x1CH3CH2COOCH2CH3+x2CH3(CH2)4CH3+(1-x1-x2)CH3CH2CH2OH} at 298.15 K,and Prediction Using Different Theoric Methods

Abstract

Excess molar enthalpies at the temperature 298.15 K and atmospheric pressure of the ternary mixture {x₁CH₃CH₂COOCH₂CH₃+x₂CH₃(CH₂)₄CH₃+(1-x₁-x₂)CH₃CH₂CH₂OH}and of the involved binary mixtures {xCH₃CH₂COOCH₂CH₃+(1-x)CH₃CH₂CH₂OH} and {xCH₃(CH₂)₄CH₃ + (1-x)CH₃CH₂CH₂OH}were measured using a Calvet microcalorimeter. Variable degree polynomials were fitted to the results. The group contribution models of Nitta-Chao and UNIFAC (versions of Tassios, Larsen and Gmehling) were used to estimate ternary excess enthalpy values, and the results were compared to the experimental data. Several empirical expressions for estimating ternary properties from binary results were also applied.