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Excess molar volumes of the (cyclohexane + pentane,or hexane,or heptane,or octane,or nonane) systems at the temperature 298.15 K
Authors:J. Balán  L. Morávková  J. Linek
Affiliation:(1) E. Hála Laboratory of Thermodynamics, Institute of Chemical Process Fundamentals, Academy of Sciences of the Czech Republic, 165 02 Prague, Czech Republic
Abstract: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.
Keywords:cyclohexane  alkanes  binary mixtures  density  excess volume
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