Density and Surface Tension Variation with Temperature for Heptane + 1-Alkanol

Abstract

New experimental densities and surface tensions for binary mixtures of {heptane + 1-butanol, + 1-hexanol, and + 1-octanol} in a temperature range of (288.15, 293.15, 298.15, 303.15, and 308.15) K are reported for the whole composition range. Densities were measured with an Anton Paar DMA 4500 densimeter. Surface tensions were measured using a Lauda TVT2 automated tensiometer, which uses the principle of the pending drop volume. The experimental data of pure liquids and mixtures have been used to calculate excess molar volumes and surface tension deviations of the mixtures as a function of mole fractions.

Densities and Excess Molar Volumes of Alkane (Heptane, Octane, Nonane, or Decane) + Thiophene from T=293.15 to 313.15 K

“…15 [4]. For each system, a good agreement was found between our results and those reported by Yu et al [4].…”

“…AARD values are reported in Table 1. For heptane, the smallest deviation was obtained with data from Vijande et al [15]. In general, the heptane densities are slightly higher than those from literature, except for the data reported by Landaverde-Cortes et al [17].…”

“…This apparatus has been tested before with measurements of densities for nonane and decane and their binary mixtures [11]. Additionally, to check the performance of the VTD the densities of the pure compounds were compared with literature values [12][13][14][15][16][17][18][19][20][21][22][23][24].…”

Sound Speed and Density Studies of Interactions Between Cationic Surfactants and Aqueous Gelatin Solution

“…The precision in these parameters has been found to be better than 2 ppm and 0.02 m · s −1 , respectively. To check the accuracy of the instrument, densities and sound speeds for different solvents has been reported in Table 1 [10][11][12][13][14]. …”

Excess Parameter Studies on Tetrahydropyran with 1-Hexanol at T = 298.15 to 318.15 K Using Anton Paar

“…THP, 1-pentanol were purchased from Aldrich chemical Company with purities >0.998, the purities of the purified liquids were checked by measuring their sound velocity, densities [recorded in Table 1] using Anton Paar DSA 5000M at the range of 298.15 to 318.15 K (± 0.01 K) and these agreed to within ±2 × 10 −3 kg m −3 with their literature values [11][12][13][14][15][16][17][18][19][20]. Sound velocity (u), densities (ρ) of the pure liquids and their binary mixture were measured using a vibrating U-tube digital density and sound analyzer as explained in the literature [21,22] which is the same as claimed by the manufacturer.…”