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  • 1
    Electronic Resource
    Electronic Resource
    Excess partial molar volumes and thermal expansivities in the water-rich region of aqueous 2-butanone (1994)
    Springer
    Journal of solution chemistry 23 (1994), S. 339-350 
    Details
    ISSN: 1572-8927
    Keywords: Excess partial molar volumes ; thermal expansivities ; aqueous 2-butanone ; transition of mixing scheme ; anomalies in third derivatives of Gibbs free energy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Excess partial molar volumes of 2-butanone V m E (B) and thermal expansivities αp were measured in the water-rich region of aqueous 2-butanone. The composition derivatives of both quantities showed anomalies at about X B =0.033 (x B is the mole fraction of B). $$(\partial V_m^E (B)/\partial n_B )_{p,T,n_w }$$ showed a step anomaly, while $$(\partial \alpha _p /\partial n_B )_{p,T,n_w }$$ exhibited a peak anomaly. The compositions at which these anomalies occurred match those of the step anomalies observed earlier in $$(\partial H_m^E (B)/\partial n_B )_{p,T,n_w }$$ and $$(\partial S_m^E (B)/\partial n_B )_{p,T,n_w }$$ in aqueous 2-butanone. These results are discussed in comparison with those obtained previously for aqueous 2-butoxyethanol.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00973554
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  • 2
    Electronic Resource
    Electronic Resource
    Excess Chemical Potentials, Excess Partial Molar Enthalpies, Entropies, Volumes, and Isobaric Thermal Expansivities of Aqueous Glycerol at 25°C (1999)
    Springer
    Journal of solution chemistry 28 (1999), S. 1137-1157 
    Details
    ISSN: 1572-8927
    Keywords: Aqueous glycerol ; vapor pressures ; excess partial molar enthalpies and volumes ; thermal expansivities ; normalized cross fluctuations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The vapor pressures p the excess partial molar enthalpies of glycerol H Gly E the densities d and the thermal expansivities αp of aqueous glycerol were measured at 25°C. From the vapor pressure data, the excess chemical potential of H2O µ W E was calculated, assuming that the partial pressure of glycerol p Gly is negligibly small. The excess chemical potential of glycerol µ Gly E was estimated by applying the Gibbs–Duhem relation and these data were used to calculate the excess partial molar entropies S Gly E . From the density data, the excess partial molar volumes of glycerol V Gly E and from the thermal expansivity data, the normalized cross fluctuations SVΔ, introduced by us earlier, were evaluated. While the detailed manner in which glycerol modifies the molecular arrangement of H2O in its immediate vicinity is yet to be elucidated, the hydrogen bond probability in the bulk H2O away from solute molecules is reduced gradually as the glycerol composition increases to the point where putative presence of icelike patches is no longer possible. Thereupon, a qualitatively different mixing scheme seems to set in.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1021703725091
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