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Citation: Zheng Guo-Kang, Fang Ji-Ye, Li Song-Lin. The Excess Volumes of Ternary——Pseudobinary Mixtures[J]. Acta Physico-Chimica Sinica, ;1991, 7(05): 566-570. doi: 10.3866/PKU.WHXB19910510 shu

The Excess Volumes of Ternary——Pseudobinary Mixtures

1.
Department of Chemistry, Lanzhou Univeristry, Lanzhou 730000

Received Date: 30 June 1990
Available Online: 15 October 1991

A method for the measurement of excess thermodynamic functions of ternary—— pseudobinary liquid mixtures
(1-x)[(1-y)A+yC]+x[(1-y)B+yC]
has been proposed. The excess volumes of two systems A=cyclohexane, B=benzene, C=toluene or methylcyclohexane have been measured at 298.15 K. Using vdW one-fluid approximation and the classical van der Waals equation, the vdW parameters of pure fluids have been evaluated by the least squares method from the V~E data of binary system. Moreover, the excess volumes of pseudobinary system can be calculated with appropriate vdW parameters of pure fluids. It has been found that the calculated values are in fairly od agreement with the experimental results.
- Ternary——psendobinary; Excess volumes
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