Viscosities of Binary Liquid Mixtures of Butanol + Pentane, + Hexane, + Heptane, and + Octane at T = 298.15 K

Abstract

Kinematic viscosities ν have been measured for binary liquid mixtures of butanol (n-C 4 H 9 OH) + pentane (n-C 5 H 12 ), + hexane (n-C 6 H 14 ), + heptane (n-C 7 H 16 ), and + octane (n-C 8 H 18 ) at T ) 298.15 K. Values of ν have been used to calculate dynamic viscosities η, using available density data. The values of the quantity ∆η, which refers to the deviations of η of mixtures from those arising from a mole fraction average, have also been calculated. The values of ν, η, and ∆η have been fitted in appropriate equations using a least-squares method. The analysis has shown that McAllister's approach correlates the liquid-mixture viscosity data of the present systems throughout the entire composition range to a significantly high degree of accuracy, whereas Lobe's approach predicts ν of mixtures to a lower degree of accuracy.

Densities and viscosities of binary mixtures of n-decane+1-pentanol, +1-hexanol, +1-heptanol at temperatures from 293.15 to 363.15K and atmospheric pressure

“…For 1-alcohol + n-alkane there are numerous reports on experimental data for excess molar volume or density [18][19][20][21][22][23][24][25][26][27][28][29][30] and viscosity [31][32][33][34][35][36][37][38][39] . Different thermodynamic properties for the binary mixtures with n-decane and 1-pentanol, 1-hexanol, or 1-heptanol have been reported in the literature.…”

Physico-chemical study of aqueous solutions of electrolytes in mixed solvents

“…Likewise, aqueous solutions of electrolytes often show some unusual properties, which in some cases cannot be explained because of limited information available in the literature. Research continues in order to explain the anomalous behaviour of aqueous solutions of electrolytes [2][3][4][5][6][7][8][9][10][11] and a few are concerned specifically with solutions of electrolytes in mixed solvents. In a recent study, it is observed that the usual structure modifying properties of some electrolytes in water have been reversed in mixed solvents of (water + methanol), particularly at a relatively higher percentage of CH 3 OH [12].…”

“…This information tempted us to carry out this study with different electrolytes. Therefore, one of the major objectives of this study is to investigate changes of structure of mixed solvent (H 2 O + CH 3 OH) by the addition of salts such as MgCl 2 , NH 4 Cl, CuCl 2 , and AlCl 3 . Such a study should complement the available information to elucidate the anomalous behaviour of the aqueous solution.…”

Densities, Viscosities, and Refractive Indices of Mixtures of Hexane with Cyclohexane, Decane, Hexadecane, and Squalane at 298.15 K

“…However, there are only a few studies that include the thermophysical properties of mixtures of hydrocarbons with higher alkanes [10][11][12][13][14][15][16][17]. The viscosity and density of mixtures of butane and hexane with squalane, intended to model mixtures of refrigerants and refrigeration oil, were measured by Kumagai and Takahashi [10].…”