Excess partial molar free energies and entropies in aqueous tert-butyl alcohol solutions at 25.degree.C

Koga, Yoshikata; Siu, William; Wong, Terrance Y. H.

doi:10.1021/j100382a070

Cited by 102 publications

(88 citation statements)

References 5 publications

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“…We note that eq. [3] contains an exponential term, which is normally avoided as a fitting function. Using eq.…”

Section: -Butoxyethano1mentioning

confidence: 99%

“…The arrows indicate the apparent laboratory on aqueous solutions of tert-butyl alcohol (heretransition points from mixing schemes 1 to 11 and 11 to 111 for after abbreviated as TBA) (1)(2)(3)(4)(5)16) and 2-butoxyethanol (BE) BE-H,O. (6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16).…”

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confidence: 99%

“…Using various derivatives including those mentioned above, it was found (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16) that the mixing scheme, the way in which the solute A and the solvent H,O mix with each other, changes qualitatively at xTBA = 0.045 for TBA-H,O and at X B E = 0.0175 for BE, both at 25°C. The threshold is characterized by anomalies in all the third derivatives of the Gibbs energy that have been investigated so far, including peaks in HAAE as shown in Fig.…”

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confidence: 99%

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Excess partial molar enthalpies of alkane-mono-ols in aqueous solutions

Tanaka¹,

Yoshihara²,

Ho³

et al. 1996

Can. J. Chem.

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Excess partial molar enthalpies, H,~, of methanol, ethanol, and 1-and 2-propanols in aqueous solutions were measured directly, accurately, and in small increments in mole fraction at 25OC. From these data, the solute-solute enthalpic interactions, HAAE = N(aHAE1a~zA), were evaluated for each alcohol. These data indicate that three distinctively different mixing schemes, I, 11, and I11 exist, as was the case for aqueous 2-butoxyethanol previously studied in our laboratory. The transition from mixing scheme I to I1 appears to take place gradually within a small composition range. As the hydrophobic moiety becomes smaller from 2-butoxyethanol to methanol, the locus of the transition moves to a higher value in mole fraction of the alcohol. At the same time, the range of transition becomes wider and the solute-solute enthalpic interaction weaker.Key words: excess partial molar enthalpies in aqueous solutions, methanol, ethanol, I-propanol, 2-propanol, enthalpic interaction, transition of mixing scheme. Ces donnCes suggkrent l'existence de trois schCmas diffirents de mClanges, I, I1 et 111, comme ce ftit le cas pour le 2-butoxyCthanol CtudiC antkrieurement dans notre laboratoire. I1 semble que la transition du schCma de melange I vers I1 se produit graduellement, B I'intCrieur d'une faible plage de composition. Quand les portions hydrophobes deviennent plus petites en allant du 2-butoxyCthanol vers le mCthanol, le foyer de la transition se dCplace vers des valeurs plus ClevCs de la fraction molaire de l'alcool. En m&me temps, l'intervalle de transition devient plus grand et l'interaction enthalpique solutC-solutC devient plus faible.Mors clis : enthalpies molaires partielles en excks en solutions aqueuses, mCthanol, ethanol, propan-1-01, propan-2-01, interaction enthalpique, schCma de transition de melange.

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“…We note that eq. [3] contains an exponential term, which is normally avoided as a fitting function. Using eq.…”

Section: -Butoxyethano1mentioning

confidence: 99%

mentioning

confidence: 99%

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confidence: 99%

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Excess partial molar enthalpies of alkane-mono-ols in aqueous solutions

Tanaka¹,

Yoshihara²,

Ho³

et al. 1996

Can. J. Chem.

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show abstract

“…The arrows indicate the position of the slope changes. (Koga et al, 1990). Middle: excess enthalpy of aqueous-ethanol mixture (Lama & Lu, 1965) Right: absorbance frequencies of aqueous-Tbutanol mixture (Pradhan et al, 2008), a function of the respective alcohol mole fraction.…”

Section: Introductionmentioning

confidence: 99%

Micro-Heterogeneity in Complex Liquids

Perera¹,

Kežić²,

Sokolić³

et al. 2012

Molecular Dynamics - Studies of Synthetic and Biological Macromolecules

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“…1 Recently, the structure of water-alcohol solutions over the whole composition region has been extensively studied by X-ray diffraction, 2 NMR, 3 mass spectrometry, 4,5 dielectric measurements, 6,7 and thermodynamic calculations. 8,9 These studies focused on the change in the structure of the cluster formed by water and alcohol molecules as the composition of the solution varied. We reported observations that suggested such structural changes using a high-frequency dielectric technique.…”

Section: Introductionmentioning

confidence: 99%