Volumetric properties of 2-ethylaminoethanol in water from 283.15 to 303.15 K

Lampreia, Isabel M.S.; Dias, Florbela; Mendonça, Ângela F. S. S.

doi:10.1039/b306856k

Cited by 31 publications

(23 citation statements)

References 23 publications

(17 reference statements)

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“…In our laboratory we have been pursuing volumetric studies in binary and ternary aqueous mixtures of amphiphilic compounds having amine and alcohol hydrophilic groups [5][6][7][8]. As far as we know only a few volumetric data are available in the literature [9] concerning this simple binary mixture.…”

Section: Introductionmentioning

confidence: 99%

Volumetric study of (diethylamine+water) mixtures between (278.15 and 308.15) K

Lampreia

Dias

Mendonça

2004

The Journal of Chemical Thermodynamics

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Section: Introductionmentioning

confidence: 99%

Volumetric study of (diethylamine+water) mixtures between (278.15 and 308.15) K

Lampreia

Dias

Mendonça

2004

The Journal of Chemical Thermodynamics

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“…Its purity was tested by measurement of its density (1 = 912.47 kg m À3 at 298.15 K), which compared well with the same-temperature values of 912.48 kg m À3 obtained by us [25] and 912.78 kg m À3 reported by Mather and co-workers. [36] Ion-exchanged (resistivity, 18 MW cm) high-purity reagentgrade Milli-Q water from Millipore was used.…”

Section: Methodsmentioning

confidence: 94%

“…where w A and w B are mass fractions, and D mix k id S is the ideal isentropic compressibility of mixing, given by Equation (25).…”

Section: Ideal Ultrasound Speed Of Mixingmentioning

confidence: 99%

“…We are unaware of similar measurements for comparison. Also given in Table S1 of the Supporting Information are the corresponding isentropic compressibilities k S , computed in terms of the Newton-Laplace equation k S = 1/1u 2 , by using previously reported [25] experimental densities 1. Thermophysical data of the pure components water and 2-(ethylamino)ethanol at 293.15 K are listed in Table S2 of the Supporting Information.…”

mentioning

confidence: 99%

“…Thermophysical data of the pure components water and 2-(ethylamino)ethanol at 293.15 K are listed in Table S2 of the Supporting Information. These data, which are required for evluating properties of ideal mixtures, were taken from various sources and include density, [26] molar isobaric heat capacity [27] and molar isobaric expansion [28] of water, and density, [25] molar isobaric heat capacity [29] and molar isobaric expansion [25] of 2-(ethylamino)ethanol. Excess speeds of ultrasound u E for the binary system water (A)/2-(ethylamino)ethanol (B) at the various mole fractions x B were least-squares fitted by using the Redlich-Kister equation [30] in the form of Equation (49), which has recently been characterised as its face B.…”

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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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Correlated Volume Fluctuations in Binary Liquid Mixtures from Isothermal Compressions at 298.15 K

Reis¹,

Santos²,

Dias³

et al. 2008

ChemPhysChem

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New fluctuation-related properties are introduced based on the link between the mean-squared fluctuation of the volume and the isothermal compressibility of binary liquid mixtures by applying the methods of chemical thermodynamics. Some weaknesses have been pointed out in previous similar attempts by other authors. A different result is obtained when Pfeiffer and Heremans' model for correlated volume fluctuations is worked out in terms of the PTN ensemble (i.e. at constant pressure and temperature). An expression is derived for estimating adjusted correlation coefficients in pairwise volume fluctuations from the knowledge of excess molar isothermal compressions, and it is shown that this expression predicts bounding values for the latter property in real mixtures. Ultrasound speeds in 31 aqueous mixtures of 2-(ethylamino)ethanol are reported at 298.15 K. The adjusted correlation coefficients for volume fluctuations are graphically depicted at several compositions of two nonaqueous mixtures and eleven aqueous amphiphile mixtures at 298.15 K. This procedure is shown to be an effective means of monitoring interactions between unlike molecules in binary liquid mixtures. A surprisingly high limiting adjusted correlation coefficient is found for water in neat amino alcohols and alcohols possessing a tertiary functional group.

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Volumetric properties of 2-ethylaminoethanol in water from 283.15 to 303.15 K

Cited by 31 publications

References 23 publications

Volumetric study of (diethylamine+water) mixtures between (278.15 and 308.15) K

Volumetric study of (diethylamine+water) mixtures between (278.15 and 308.15) K

Chemical Thermodynamics of Ultrasound Speed in Solutions and Liquid Mixtures

Correlated Volume Fluctuations in Binary Liquid Mixtures from Isothermal Compressions at 298.15 K

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