Densities and Excess Molar Volumes of 2-Butanol + Cyclohexanamine + Heptane and 2-Butanol + n -Heptane at Temperatures between (288.15 and 323.15) K (original) (raw)
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Thermochimica Acta, 2009
Experimental densities and excess molar volumes V E of one ternary and three binary systems containing 1-butanol, cyclohexylamine and n-heptane at temperatures from 283.15 to 323.15 K are reported. Density measurements were performed by an Anton Paar DMA 5000 vibrating tube densimeter. The obtained V E of binary systems were fitted to the Redlich-Kister equation, and to the Nagata-Tamura equation for the ternary system. For the correlation of V E data of binary systems van der Waals (vdW1) and Twu-Coon-Bluck-Tilton (TCBT) mixing rules coupled with the Peng-Robinson-Stryjek-Vera (PRSV) equation of state were applied. The same models were applied for the prediction and correlation of V E data of the ternary system. In addition, several empirical relationships were applied for the prediction of V E data of the ternary system from the corresponding binary data. The obtained results have been analysed in terms of specific molecular interactions present in the investigated mixtures taking into considerations the effect of temperature increasing on present interactions.
Densities and excess molar volumes of alcohol + cyclohexylamine mixtures
Journal of the Serbian Chemical Society, 2009
Densities of binary mixtures of 1-propanol, or 2-butanol, or 1-pentanol + cyclohexylamine were measured at temperatures from 288.15 to 313.15 K and atmospheric pressure, while the densities for the system 2-methyl-2-propanol + cyclohexylamine were measured at temperatures from 303.15 to 323.15 K and atmospheric pressure. All measurements were performed using an Anton Paar DMA 5000 digital vibrating-tube densimeter. From the experimental densities, the excess molar volumes, V E , were calculated.
J. Chem. Eng. Data, 1997
Excess molar volumes, have been measured for binary 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 ), + octane (n-C 8 H 18 ), + 2,2,4-trimethylpentane (2,2,4-TMP), and + carbon tetrachloride (CCl 4 ) at 288.15 K ...
Thermodynamic study of (heptane+amine) mixtures. II. Excess and partial molar volumes at 298.15K
The Journal of Chemical Thermodynamics, 2011
Excess molar volumes V E at 298.15 K were determined by means of a vibrating tube densimeter for binary mixtures of heptane + primary n-alkyl (C 3 to C 10 ) and branched amines (iso-propyl-, iso-, sec-, and tert-butyl-, iso-, tert-pentyl-, and pentan-3-amine) in the whole composition range. The apparent molar volumes of solid dodecyl-and tetradecylamine in heptane dilute solution were also determined. The V E values were found positive for mixtures involving C 3 to C 8 linear amines, with V E decreasing with chain lengthening. Heptane + nonyl and decylamine showed s-shaped, markedly asymmetric, curves. Mixtures with branched C 3 to C 5 amines displayed positive V E 's larger than those observed in the mixtures of the corresponding linear isomers. Partial molar volumes V°at infinite dilution in heptane were evaluated for the examined amines and compared with those of alkanes and alkanols taken from the literature. An additivity scheme, based on the intrinsic volume approach, was applied to estimate group (CH 3 , CH 2 , CH, C, NH 2 , and OH) contributions to V°. The effect of branching on V°and the limiting slope of the apparent excess molar volumes were evaluated and discussed in terms of solute-solvent and solute-solute interactions.
Excess molar volumes of binary mixtures of 1-heptanol or 1-nonanol with n-polyethers at 25 degrees C
Journal of Solution Chemistry, 2000
Excess molar volumes V E m at 25ЊC and atmospheric pressure over the entire composition range for binary mixtures of 1-heptanol with 2, 5-dioxahexane, 2,5,8trioxanonane, 5,8,11-trioxapentadecane, 2,5,8,11-tetraoxadodecane, or 2,5,8, 11,14-pentaoxapentadecane, and mixtures of 1-nonanol with 2,5-dioxahexane, 3,6-dioxaoctane, 2,5, 8-trioxanonane, 3,6,9-trioxaundecane, 5,8,11-trioxapentadecane, 2,5,8,11-tetraoxadodecane, or 2,5,8,11,14-pentaoxapentadecane are reported from densities measured with a vibrating-tube densimeter. V E m curves are nearly symmetrical at about 0.5 mole fraction. Excess molar volumes are usually positive, indicating predominance of positive contributions to V E m from the disruption of H bonds of alcohols and from physical interactions. When chain lengths of both components of the mixture are increased, the contribution from interstitial accommodation appears to be sufficiently negative, such that V E m becomes negative (e.g., l-nonanol ϩ 5,8,11-tetraoxapentadecane).
Effect of temperature on excess molar volumes of binary mixtures of hexadecane and butanol
2000
Mol ar excess vo lumes {V'l have been evaluated for bin ary mi xtures of Hexadeeane and Butanol i n th e temperature ran ge of 303. 15K to 3 1 X. 15 Kat 5 K intervals V E va lues ha ve been co mputed from density at va ri ous co mposit ions. V E are negati ve over th e entire ra nge of composition and become less negative at increasing temperatures. The results of excess molar vo lume are filled to th e Red l ich-Ki ster relation to estimate the adjustabl e parameters and standard dev iations. The results are discussed 0 11 th e basis o f intermolecular interacti ons hetween unlike molecules. 12 Dcan J A. Langc' s handbook or chcmi stry. Edn 13. (McGr,lw-H ill. Ncw York). 1987. 13 Pal A mal endu & Singh Y P. Il/diol/ .1 Chell!. 36A (19lJ7) 4~ I .
The Journal of Chemical Thermodynamics, 2012
Densities of binary liquid mixtures of N-ethylformamide (NEF) with tetrahydrofuran (THF), 2-butanone (B), and ethylacetate (EA) were measured at temperatures from (293.15 to 313.15) K and at atmospheric pressure over the whole composition range. Excess molar volumes, V E , have been obtained from values of the experimental density and were fitted to the Redlich-Kister polynomial equation. The V E values for all three mixtures are negative over the entire composition and temperature ranges. The V E values become more negative as the temperature increases for all binary mixtures studied. Other volumetric properties, such as isobaric thermal expansion coefficients, partial molar volumes, apparent molar volumes, partial molar excess volumes and excess thermal expansions have been calculated.
Journal of Chemical & Engineering Data, 2008
Densities and Excess Molar Volumes of the Ternary Mixture 2-Butanol + Chloroform + Benzene and Binary Mixtures 2-Butanol + Chloroform, or + Benzene over the Temperature Range (288.15 to 313.15) K Densities F and excess molar volumes V E of the 2-butanol + chloroform + benzene ternary mixtures and two binaries, 2-butanol + chloroform and 2-butanol + benzene, have been determined. Experimental F measurements have been performed at six temperatures, (288.15, 293.15, 298.15, 303.15, 308.15, and 313.15) K, and atmospheric pressure with an Anton Paar DNA 5000 digital vibrating tube densimeter. Excess molar volumes V E were correlated by the Redlich-Kister equation for binary mixtures and the Nagata-Tamura equation for ternary mixtures.
2010
Densities and excess molar volume of the binary and ternary mixtures formed by nbutylacetate + 1-butanol + 1,2-butanediol were measured at (298.15, 303.15, and 308.15) K for the liquid region and at ambient pressure (81.5) k Pa , for the whole composition range. The excess molar volumes,Vm and excess partial molar volume Vi ,were calculated from experimental densities.The excess molar volumes are positive over the mole fraction rage for binary mixtures of n-butylacetate (1) + 1-butanol (2) and n-butylacetate (2) + 1,2-butanediol (3) and increase with increasing temperatures from (298.15 to 308.15)K. The excess molar volumes of 1-butanol (1) + 1,2-butanediol (3) are negative and decrease with increasing temperatures from (298.15 to 308.15)K..The experimental data of constitute were correlated as a function of the mole fraction by using the Redlich–Kister equation for binary and , Cibulka, Jasinski and Malanowski , Singe et al, Pintos et al , Calvo et al, Kohler, and Jacob Fitzner for...
Chemical Engineering Communications, 2005
Densities of the binary systems of dimethyl sulfoxide with ethyl acrylate, butyl acrylate, methyl methacrylate, and styrene have been measured as a function of the composition at 298.15 K and atmospheric pressure using an Anton Paar DMA 5000 oscillating U-tube densimeter. The calculated excess volumes were correlated with the Redlich-Kister equation and with a series of Legendre polynomials. The excess volumes are negative for the four binaries, probably as a result of the large dipole moment of DMSO, becoming smaller as the monomer becomes more branched or longer, and the dipole moment per monomer unit becomes larger.