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  • 1
    Electronic Resource
    Electronic Resource
    Enthalpy of dilution of tetra-n-butylammonium bromide in mixtures of water and N-methylacetamide (1974)
    Springer
    Journal of solution chemistry 3 (1974), S. 233-237 
    Details
    ISSN: 1572-8927
    Keywords: N-methylacetamide ; tetrabutylammonium bromide ; enthalpy of dilution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The enthalpy of dilution of tetra-n-butylammonium bromide in mixtures of water and N-methylacetamide has been measured from approximately 0.1 to 1.0m at 35°C. The mole fraction of water in the solvent varied from 0.250 to 0.969. The results are strikingly nonlinear in the mole fraction of water. As the mole fraction of water varies from 0 to 0.7, there is only a small change in the enthalpy of dilution. At higher mole fractions of water, the excess enthalpy rises sharply to the unusually high values found in water. This indicates that the unusually high values of excess enthalpy associated with hydrophobic bonding in water are destroyed by relatively small amounts of N-methylacetamide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00645635
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The heat of mixing electrolytes: The cross-square rule in the solvent N-methylacetamide (1974)
    Springer
    Journal of solution chemistry 3 (1974), S. 239-246 
    Details
    ISSN: 1572-8927
    Keywords: Heat of mixing ; N-methylacetamide ; electrolytes ; crosssquare rule
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The six possible heats of mixing of the system Na+, Pr4N+−Br−, I− have been measured at 35°C in the solvent N-methylacetamide at an ionic strength of 0.5. The cross-square rule of T. F. Young(1,2) does not hold accurately, and there are strong attractive forces between a cation and an anion. The largest effect in the heats of mixing is the formation of tetra-n-propylammonium iodide interactions. The data is compared to that of the Na+,K+−Cl−,NO 3 − system in water.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00645636
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    The enthalpies and entropies of dilution of alkali halides and tetraalkylammonium halides in N-methylacetamide (1974)
    Springer
    Journal of solution chemistry 3 (1974), S. 215-232 
    Details
    ISSN: 1572-8927
    Keywords: Enthalpy ; dilution ; N-methylacetamide ; alkali halides ; tetraalkylammonium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The enthalpies of dilution of some alkali and tetraalkylammonium halides have been measured in N-methylacetamide at 35°C. The results approach the Debye-Hückel limiting law at low concentrations. Excess free energies and entropies were calculated from the present results and previous freezing point measurements. The excess enthalpies of the alkali halides in N-methylacetamide are in the same range as the excess enthalpies in water. The effect of changing anions is quite small in N-methylacetamide. The cation order is Li+≃Na+〉Cs+〉K+. The excess enthalpies of the tetraalkylammonium halides in N-methylacetamide are very different from the excess enthalpies in water, confirming the conclusion that in water the large excess enthalpies are due to hydrophobic bonding and that in N-methylacetamide this effect is not present.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00645634
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    Paper (German National Licenses)
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