The two faces of the Redlich–Kister equation and the limiting partial molar volume of water in 1-aminopropan-2-ol

Oliveira, Jaime D. Gomes de; Reis, João Carlos R.

doi:10.1016/j.tca.2007.12.002

Cited by 16 publications

(10 citation statements)

References 19 publications

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“…44 where Y E represents V E , C p E , and ∆η, x 1 and x 2 are the mole fraction of the components 1 and 2, and A i are the adjustable parameters. The optimum number of adjustable parameters A i was ascertained from an examination of the RAD, and the results are reported in Table 6.…”

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Volumetric Properties, Viscosities, and Isobaric Heat Capacities of Imidazolium Octanoate Protic Ionic Liquid in Molecular Solvents

2010

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Densities (F), viscosities (η), and isobaric heat molar capacities (C p ) of binary mixtures containing imidazolium octanoate, [Im][C 7 CO 2 ], a protic ionic liquid (PIL), with four molecular solvents, water, acetonitrile, ethanol, and 1-octanol, are determined as a function of temperature from (298.15 to 323.15) K and within the whole composition range at atmospheric pressure. Excess molar volumes, V E , excess molar heat capacities, C p E , and the deviation from additivity rules of viscosities, ∆η, of imidazolium octanoate solutions were then deduced from the experimental results, as well as apparent molar volumes, V φi , and partial molar volumes, V j m,i . Results are discussed according to the nature of the interaction between the PIL and the molecules and the effect of temperature. The excess Gibbs energies of activation of viscous flow (∆G *E ) for these systems were then calculated at 298.15 K. The excess isobaric heat capacities, C p E , of binary ([Im][C 7 CO 2 ] + solvent) systems, depend also of the nature of the molecular solvent in mixture. The excess properties were then correlated, at each temperature, as a function of composition by a Redlich-Kister-type equation. Finally results have been discussed in terms of molecular interactions and molecular structures in these binary mixtures, and thermodynamic properties of investigated binary mixtures were then compared to literature values together to investigate the impact of the nature of the solvent on these reported properties.

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Volumetric Properties, Viscosities, and Isobaric Heat Capacities of Imidazolium Octanoate Protic Ionic Liquid in Molecular Solvents

2010

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“…However, for drawing conclusions about the molecular reorganisation accompanying mixing processes, there is a general consensus [19] that molar properties such as V E m and K E S;m are better suited for this purpose than volume-specific properties such as 1 E and k E S . For this reason we focus attention on Equation (31) and, in order to better discuss its applications, rewrite it in the form of Equation (33). www.chemphyschem.org…”

Section: Excess Ultrasound Speed and Its Relation To Excess Molar Volmentioning

confidence: 99%

“…Such behaviour suggesting that K E S;m and u E convey similar information has since then been highlighted by various authors for both non-aqueous [16j, 22] and aqueous [23] binary liquid mixtures. This analysis can be pursued further by taking the composition derivative of Equation (31). At constant T and p, this operation leads to Equation (36).…”

Section: Excess Ultrasound Speed and Its Relation To Excess Molar Volmentioning

confidence: 99%

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Chemical Thermodynamics of Ultrasound Speed in Solutions and Liquid Mixtures

2010

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A comprehensive formalism is developed to treat thermodynamically speed of ultrasound data for solutions and liquid mixtures. For solutions, the apparent speed of ultrasound of a solute is introduced and proposed to take the place of empirically defined quantities. The partial speed of ultrasound of a solute is defined and related to the partial molar volume and partial molar isentropic compression. For liquid mixtures, the concept of speed of sound before mixing pure liquids is presented and used to define the change in speed of ultrasound upon ideal mixing, which is predicted to be generally a negative quantity. A new thermodynamic equation is derived linking the values for excess speed of ultrasound, excess molar volume and excess molar isentropic compression of a mixture, and its applications are discussed. Ideal and excess apparent speeds of ultrasound, as well as ideal and excess partial speeds of ultrasound, are defined for substances making up a liquid mixture. Accurate speeds of ultrasound in 31 mixtures of water with the amphiphile 2-(ethylamino)ethanol at 293.15 K are reported. These data are used to demonstrate the ability of the apparent speed of ultrasound to describe the impact of solutes on sonic properties of solutions and the advantages of analysing thermodynamic properties of binary liquid mixtures in terms of the dependence on composition of Balankina's ratios between excess and ideal values. It is concluded that the new thermodynamic functions defined for speeds of ultrasound in solutions and liquid mixtures give, at the least, equivalent information on molecular aspects to the usual functions related to the isentropic compressibility, without needing density data for this purpose.

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“…The resulting expressions which have been used by several authors [23,[34][35][36] are given by equations (9) and (10) for components 2 and 1, respectively. lim The results are shown in table 4 jointly with their uncertainty.…”

Section: Excess Molar and Partial Molar Volumesmentioning

confidence: 99%

Volumetric properties of (1-propoxypropan-2-ol+water) mixtures between (283 and 303)K: The effect of branching on alkoxyalcohols

Santos

Moita

Lampreia

2009

The Journal of Chemical Thermodynamics

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The two faces of the Redlich–Kister equation and the limiting partial molar volume of water in 1-aminopropan-2-ol

Cited by 16 publications

References 19 publications

Volumetric Properties, Viscosities, and Isobaric Heat Capacities of Imidazolium Octanoate Protic Ionic Liquid in Molecular Solvents

Volumetric Properties, Viscosities, and Isobaric Heat Capacities of Imidazolium Octanoate Protic Ionic Liquid in Molecular Solvents

Chemical Thermodynamics of Ultrasound Speed in Solutions and Liquid Mixtures

Volumetric properties of (1-propoxypropan-2-ol+water) mixtures between (283 and 303)K: The effect of branching on alkoxyalcohols

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