Journal
CHEMICAL PAPERS
Volume 61, Issue 6, Pages 497-501Publisher
SPRINGER INTERNATIONAL PUBLISHING AG
DOI: 10.2478/s11696-007-0068-6
Keywords
cyclohexane; alkanes; binary mixtures; density; excess volume
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The densities of the (cyclohexane + pentane, or hexane, or heptane, or octane, or nonane) systems were measured at the temperature 298.15 K by means of a vibrating-tube densimeter. Their respective excess molar volumes were calculated and correlated using the fourth-order Redlich-Kister equation, with the maximum likelihood principle being applied in the determination of the adjustable parameters. The values of excess molar volumes were negative for the cyclohexane + pentane system, whereas they were positive for the other systems with the values increasing with the number of carbon atoms in the respective alkane molecules.
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