Densities, Viscosities, and Speeds of Sound of Binary Mixtures of Heptan-1-ol with 1,4-Dioxane at Temperatures from (298.15 to 323.15) K and Atmospheric Pressure

Abstract

Densities, ρexp, viscosities, ηexp, and speeds of sound, c exp, of pure heptan-1-ol and 1,4-dioxane and their binary mixtures have been measured over the entire range of composition at temperatures from (298.15 to 323.15) K with an interval of 5 K and at the atmospheric pressure. The experimental data have been used to calculate the following: excess molar volumes, V m E, deviation in speeds of sound, Δc, isentropic compressibility, κ s , deviation in isentropic compressibility, Δκ s , and viscosity deviations, Δη. The values of V m E and Δκ s have been found to be positive throughout the composition range and at all temperatures, whereas Δc and Δη were negative. The excess or deviation properties (V m E, Δc, Δκs, or Δη) have been correlated using a Redlich–Kister type equation to obtain their coefficients and standard deviations. The modified Rackett equation has been employed to correlate with the experimental molar volume of the component liquids and the binary mixtures. The measured mixture viscosity data have been correlated using semiempirical models, such as Andrade/DIPPR and Grunberg–Nissan. The thermodynamic, transport, and acoustic behaviors have been discussed in terms of the molecular interactions and structural effects due to the components of the binary mixtures. Furthermore, the diversity in the thermodynamic or transport behavior of the binary mixtures of 1,4-dioxane with heptan-1-ol and other alkan-1-ol systems has been compared and discussed in terms of the changes in the chain length or the solution properties of the mixed systems.

Ultrasonic Speed and Related Thermo-acoustical Parameters of Solutions of 1,1′-Bis(3-methyl-4-ethoxyacetylphenoxy)cyclohexane at Four Different Temperatures

“…From the stock solutions a series of dilute solutions (0.1-0.01 molÁdm -3 ) were prepared in air-tight measuring flasks. The q, g and U data of pure solvents along with literature values [24][25][26][27][28][29][30][31][32][33][34] are reported in Table 1.…”

Densities and Excess Molar Volumes of the Ternary System (1,4-Dioxane + 2-Propanol + 1,1,2,2-Tetrachloroethane) at T = 288.15–318.15 K and at Atmospheric Pressure: Experimental Measurements and Prigogine–Flory–Patterson Modeling

“…The chemicals were used without further purification. Density measurements for the pure liquids were carried out at the temperature range T = 283.15–318.15 K and at atmospheric pressure, and well compared with open literature data − in Table . The observed deviations between our experimental density values, and the literature data are small and would probably be due to the difference in the origin and purity of the compounds and also to other conditions such as humidity and pressure.…”

“… a Ref . b Ref . c Ref . d Ref . e Ref . f Ref . g Ref . h Ref . i Ref . j Ref . k Ref . l Ref . m Ref . n Ref . o Ref . p Ref . q The pressure for the density measurement was 101.3 kPa; the standard uncertainties, u , are u ( T ) = 0.01 K, u ( p ) = 5 kPa, and u r (ρ) = 0.0005. …”

Thermo-Acoustical Study of Biologically Active 1,1’-Bis(3-Methyl-4-Carboxyethylphenoxy) Cyclohexane at Four Different Temperatures

“…Ltd. Mumbai and were purified according to literature methods [18]. The density (ρ), viscosity (η) and ultrasonic speed (U) of pure solvents were compared with the literature values [19][20][21][22][23][24][25][26][27][28][29] and are shown in Table 1.…”