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标题：THEORETICAL ESTIMATION OF INTERNAL PRESSURE AND EXCESS INTERNAL PRESSURE IN BINARY LIQUID MIXTURES
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作者：P. PAUL DIVAKAR ; K. SAMATHA
期刊名称：Indian Streams Research Journal
印刷版ISSN：2230-7850
出版年度：2011
卷号：I
期号：IX
出版社：Indian Streams Research Journal
摘要：In recent years, in the study of molecular interactions in binary liquid mixtures by acoustical methods, internal pressure has gained significant interest. Several attempts have been made to calculate the internal pressure of liquids and liquid mixtures theoretically. Here we made use of two empirical methods to estimate the internal pressure in four binary liquid mixtures viz., cyclohexanone with isopropyl acetate and isobutyl acetate and N,N-Dimethyl acetamide with o-cresol and mcresol. The ultrasonic velocity (U), density (ρ) and viscosity (η) have been measured for the said binary mixtures at 308 K. Excess internal pressure has also been calculated from the experimental data of pure liquids and liquid mixtures. The excess values give better understanding of the molecular interactions between the components.
关键词：Ultrasonic velocity;binary liquid mixtures;internal pressure;molecular interactions