Apparent molal heat capacities of organic solutes in water. V. aminoalcohols, aminoethers, diamines, and polyethers

Cabani, Sergio; Lobo, Sheila Teresa; Matteoli, Enrico

doi:10.1007/bf00646804

Cited by 12 publications

(4 citation statements)

References 15 publications

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“…Possibilities for comparison of these values with literature data are rather limited. Fair agreement can be noted with the older, less precise results of Cabani et al23 for diethyl ether (250 J‚K -1 ‚mol -1 ) and dimethoxymethane (111 J‚K -1 ‚mol -1 ) obtained for rather insufficiently dilute solutions by adiabatic C p calorimetry. For diethyl ether, noteworthy is the excellent agreement with the value 242 J‚K -1 ‚mol -1 obtained at 298.15 K from very recent C p measurements of Slavı ´k et al,24 even though these investigators targeted mainly elevated temperature and pressure conditions.…”

supporting

confidence: 78%

Refined Flow Microcalorimetric Setup for Measurement of Mixing Enthalpies at High Dilutions: Determination of Infinite Dilution Dissolution Enthalpies of Some Alkanol and Ether Solutes in Water

and

Řehák

2007

J. Chem. Eng. Data

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A refined flow microcalorimetric setup with a fully automatic control of the entire experimental sequence has been designed for accurate measurement of mixing enthalpies of highly dilute aqueous solutions as a function of composition and, in turn, for reliable determination of the solute's infinite dilution dissolution enthalpies (Δsol ). The instrument and procedure were extensively tested, and their performance was verified using various microcalorimetric standards and further test reactions that involved the dissolutions of 1-propanol at eight temperatures from (283.15 to 318.15) K, of 1-butanol at 298.15 K, of 2-hexanol at five temperatures from (288.15 to 318.15) K and the dilutions of 10 % mass fraction aqueous 1-propanol and 2 mol·kg-1 sucrose solutions at 298.15 K. It was found that even for viscous solute media (viscosity 7 mPa·s) of limited aqueous solubility (mole fraction 0.002), Δsol could be determined with a combined standard uncertainty of 1 % or lower. The microcalorimeter was employed to determine Δsol for further oxygenated solutes for which these data are lacking or insufficient, namely, for 2-pentanol, 3-methyl-1-butanol, and 3-methyl-2-butanol at 298.15 K, for 1-methoxy-2-propanol at four temperatures from (288.15 to 318.15) K, for diethyl ether at five temperatures from (283.15 to 303.15) K, and for dimethoxymethane at seven temperatures from (288.15 to 318.15) K. The measurements of Δsol as a function of temperature enabled us to derive reliable values of infinite dilution dissolution heat capacities.

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supporting

confidence: 78%

Refined Flow Microcalorimetric Setup for Measurement of Mixing Enthalpies at High Dilutions: Determination of Infinite Dilution Dissolution Enthalpies of Some Alkanol and Ether Solutes in Water

and

Řehák

2007

J. Chem. Eng. Data

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“…Using the indicated literature data for thermochemical properties, we estimate K T,m at 298.15 K, according to Equation (47), for the following twelve liquid mixtures: benzene/cyclohexane,23 decane/propan‐1‐ol,24 water/propan‐1‐ol,25 water/propan‐2‐ol,25 water/2‐methylpropan‐2‐ol,25 water/ethane‐1,2‐diol,25 water/2‐methoxyethanol,25 water/2‐ethoxyethanol,25 water/2‐butoxyethanol,25 water/2‐aminoethanol,2c, 26 water/2‐(dimethylamino)ethanol,16b,c, 26a, 27 and water/2‐(diethylamino)ethanol 16b,c. 20a From these estimated K T,m data, which are reported in Tables S2 and S3 of the http://www.wiley-vch.de/contents/jc_2267/2008/f800057_s.pdf, we compute ${K_{{\rm{T}}{\rm{,m}}}^{\rm{E}} }$ and ${f_{\rm{c}} r(\,V{^\prime}_{\rm{A}} {\rm{,}}V{^\prime}_{\rm{B}} )}$ using Equations (48) and (34), respectively.…”

Section: Resultsmentioning

confidence: 99%

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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“…All data correspond to 298.15 K and 0.1 MPa, “ref” is the average contribution of amino group obtained from experimental results on aliphatic primary amines. Experimental data: (a) Cabani et al; (b) Kaulgud et al; (c) Kaulgud and Patill; (d) Shahidi et al; (e) Ruzicka et al; (f) Konicek and Wadso; (g) Nichols and Wadso; (h) Makhatadze and Privalov; (i) Riedl and Jolicoeur; (j) Cabani et al; (k) Bergstrom and Olofsson; (l) Bernauer et al; (m) Nichols et al; (n) Cabani et al…”

Section: Resultsmentioning

confidence: 99%

Application of Group Additivity Approach to Polar and Polyfunctional Aqueous Solutes

Sedlbauer

Jakubu

2008

Ind. Eng. Chem. Res.

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Estimates of physical or thermodynamic properties of organic compounds are often based on a group contribution approach or other quantitative structure−property relationship. Polar functional groups introduce a perturbation to intramolecular distribution of electrons, resulting in violation of a group additivity assumption known as structural or proximity effects. We propose a method for quantitative evaluation of these effects from experimental data and present the results for polar functional group contributions and their structural/proximity effects calculated for several standard thermodynamic properties of hydration at ambient conditions and at high temperatures and pressures. Recommendations are provided for further developments of group contribution methods in aqueous solutions of organics.

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Apparent molal heat capacities of organic solutes in water. V. aminoalcohols, aminoethers, diamines, and polyethers

Cited by 12 publications

References 15 publications

Refined Flow Microcalorimetric Setup for Measurement of Mixing Enthalpies at High Dilutions: Determination of Infinite Dilution Dissolution Enthalpies of Some Alkanol and Ether Solutes in Water

Refined Flow Microcalorimetric Setup for Measurement of Mixing Enthalpies at High Dilutions: Determination of Infinite Dilution Dissolution Enthalpies of Some Alkanol and Ether Solutes in Water

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

Application of Group Additivity Approach to Polar and Polyfunctional Aqueous Solutes

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