Densities, viscosities, and isobaric heat capacities of the system (1-butanol+cyclohexane) at high pressures

•The densities of cyclohexane and its mixtures with 1-butanol were measured.•The excess molar volumes were calculated and correlated.•The viscosities were measured at atmospheric pressure.•The isobaric heat capacities were measured at p=(0.1 to 25)MPa at T=(293.15 and 313.15)K.•A positive deviation...

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Bibliographic Details
Published in:The Journal of chemical thermodynamics 2014-07, Vol.74, p.153-160
Main Authors: Torín-Ollarves, Geraldine A., Martín, M. Carmen, Chamorro, César R., Segovia, José J.
Format: Article
Language:English
Subjects:
1-Butanol
Cyclohexane
Density
Deviation
Heat capacity
Isobaric heat capacity
Mathematical analysis
Specific heat
Tait equation
Tubes
Viscosity
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Summary:•The densities of cyclohexane and its mixtures with 1-butanol were measured.•The excess molar volumes were calculated and correlated.•The viscosities were measured at atmospheric pressure.•The isobaric heat capacities were measured at p=(0.1 to 25)MPa at T=(293.15 and 313.15)K.•A positive deviation from the ideal behavior is observed. The cyclohexane and the system of 1-butanol+cyclohexane have been characterized using densities, viscosities and isobaric heat capacities measurements. For that, the densities were measured in a high-pressure vibrating tube densimeter at five temperatures from (293.15 to 333.15)K and pressures up to 100MPa. The measurements were correlated with the empirical Tamman–Tait equation. Moreover, the isobaric heat capacities of the binary system were measured in a high-pressure automated flow calorimeter at T=(293.15 and 313.15)K and pressures up to 25MPa for pure cyclohexane and in admixture with 1-butanol. The excess molar heat capacities were assessed for the mixture and a positive deviation from the ideality was obtained, except for a small part in the region rich in alkanol. The viscosity measurements were carried out, at the calorimeter conditions, for correcting the experimental values of isobaric heat capacities due to friction along the tube. The viscosity was measured at atmospheric pressure in a Stabinger Anton Paar SVM 3000 viscometer in the temperature range of (293.15 to 333.15)K for cyclohexane and the mixtures. At high pressure, the viscosities were estimated using Lucas method.
ISSN:0021-9614
1096-3626
DOI:10.1016/j.jct.2014.01.020