NDLI: Competition of Viscosity Correlation Equations in Isobutyric Acid + Water Binary Mixtures Near and Far Away from the Critical Temperature

Content Provider	Springer Nature Link
Author	Ouerfelli, N. Kouissi, T. Zrelli, N. Bouanz, M.
Copyright Year	2009
Abstract	Shear viscosity deviations Δη have been investigated by using density (ρ) and kinematic viscosity (ν) measurements for isobutyric acid + water (IBA + W) mixtures over the entire range of mole fractions at atmospheric pressure and at two temperatures (301.15 and 315.15 K). This study extends the temperature range from the five other temperatures investigated in a previous work, 1.055 K≤(T−T $_{ c }$)≤14.055 K, both far from and close to the critical temperature. This system exhibits very large positive values of Δη due to increased hydrogen bonding interactions and the correlation length between unlike molecules in the critical region, and to very large differences between the molar volumes of the pure components at low temperatures. The results were also fitted with the Redlich–Kister polynomial equations and the recently proposed Herráez correlation equation. Comparisons between the two models at different temperatures and number of parameters are discussed. We note that, in this system where the shear viscosity η as a function of mole fraction (x $_{1}$) of IBA presents a maximum, experimental data are in agreement with the two correlation models when more than three parameters are employed, especially for temperatures far from the critical temperature.
Starting Page	983
Ending Page	1004
Page Count	22
File Format	PDF
ISSN	00959782
Journal	Journal of Solution Chemistry
Volume Number	38
Issue Number	8
e-ISSN	15728927
Language	English
Publisher	Springer US
Publisher Date	2009-06-26
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Viscosity correlation Empirical equation Binary critical mixture Isobutyric acid Redlich–Kister equation Herráez equation Condensed Matter Inorganic Chemistry Oceanography Geochemistry Industrial Chemistry/Chemical Engineering Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Biochemistry Molecular Biology Biophysics Physical and Theoretical Chemistry

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