Molar heat capacities of alkanolamines from 299.1 to 397.8 K Group additivity and molecular connectivity analyses

Maham, Yadollah; Hepler, Loren G.; Mather, Alan E.; Hakin, Andrew W.; Marriott, Robert A.

doi:10.1039/a607568a

Cited by 75 publications

(71 citation statements)

References 11 publications

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“…(1,2) Densities, excess molar volumes, and excess molar enthalpies of (monoethanolamine, MEA, + H 2 O), (monomethylethanolamine, MMEA, + H 2 O), and (dimethylethanolamine, DMEA, + H 2 O) were studied at T = 298.15 K. (3) Excess molar volumes of aqueous solutions of (MEA + H 2 O), (diethanolamine, DEA, + H 2 O), and (triethanolamine, TEA, + H 2 O) (4) and of (methyldiethanolamine, MDEA, + H 2 O) and (ethyldiethanolamine, EDEA, + H 2 O) (5) were measured from T = (298.15 to 353.15) K. Densities and excess molar volumes of (DMEA + H 2 O) and (diethylethanolamine, DEEA, + H 2 O) were reported at T = (293.15 to 313.15) K. (6) Transport properties of pure ethanolamines (7) and (DEA + H 2 O) and (MDEA + H 2 O) have also been studied. (8) Heat capacities (9) and thermal conductivities (10) (12) and of (monoethylethanolamine,…”

Section: Introductionmentioning

confidence: 99%

Excess properties of (alkyldiethanolamine +H2O) mixtures at temperatures from (298.15 to 338.15) K

Maham

Mather

Mathonat

2000

The Journal of Chemical Thermodynamics

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Section: Introductionmentioning

confidence: 99%

Excess properties of (alkyldiethanolamine +H2O) mixtures at temperatures from (298.15 to 338.15) K

Maham

Mather

Mathonat

2000

The Journal of Chemical Thermodynamics

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“…The values of Δβ are negative at all the temperatures and the values of Δβ become less negative as temperature increased ( Figure 6). This may be attributed to the weakening of structure making interactions at elevated temperatures due to enhanced thermal motion [20].…”

Section: Resultsmentioning

confidence: 99%

Thermophysical and Acoustical Properties of Benzylparaben with Benzene at Temperatures of 303.15, 308.15 and 313.15 K

Reddy¹,

Mallu²

2015

Biochem Physiol

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Citation: Reddy GS, Reddy MM (2015) ), viscosity deviation (Δη), refractive index deviation (Δn D ), deviations in ultrasonic velocity (Δu), isentropic compressibility (β), deviations in isentropic compressibility (Δβ), intermolecular free length (L f ), deviation in intermolecular free length (ΔL f ), Acoustic impedance (Z), deviation in acoustic impedance (∆Z), molar compressibility or Wada's constant(W), molar sound velocity (R), degree of intermolecular attraction (δ), relaxation time (τ), Free volume (V f ) and absorption coefficient (α), deviation in surface tension (∆σ). The viscosity data have been correlated with the equations of Krishnan-Laddha and McAllister. The thermo physical properties under study were fit to the Jouyban-Acree model. The excess values were correlated using Redlich-Kister polynomial equation to obtain their coefficients and standard deviations. It was found that in all cases, the data obtained fitted with the values correlated by the corresponding models very well. The results are interpreted in terms of molecular interactions occurring in the solution.

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“…To establish its links with other excess properties, we start with the Newton-Laplace equation in the form K S,m Mu 2 V 2 m = 1, and analogously for K id S;m , and write Equation (29).…”

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

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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confidence: 99%

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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Molar heat capacities of alkanolamines from 299.1 to 397.8 K Group additivity and molecular connectivity analyses

Cited by 75 publications

References 11 publications

Excess properties of (alkyldiethanolamine +H2O) mixtures at temperatures from (298.15 to 338.15) K

Excess properties of (alkyldiethanolamine +H2O) mixtures at temperatures from (298.15 to 338.15) K

Thermophysical and Acoustical Properties of Benzylparaben with Benzene at Temperatures of 303.15, 308.15 and 313.15 K

Chemical Thermodynamics of Ultrasound Speed in Solutions and Liquid Mixtures

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