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RESEARCH PRODUCT
(Vapour + liquid) equilibria of (water + dimethylformamide): application of the headspace-gas chromatography for the determination of thermodynamic interactions
R. HorstBernhard A. WolfC. Barthsubject
Vapor pressureThermodynamicsFlory–Huggins solution theoryEntropy of mixingAtomic and Molecular Physics and OpticsIsothermal processGibbs free energychemistry.chemical_compoundsymbols.namesakechemistrysymbolsDimethylformamideGeneral Materials ScienceGas chromatographyBinary systemPhysical and Theoretical Chemistrydescription
Abstract Isothermal measurements of the partial vapour pressures have been carried out on {water + dimethylformamide (DMF)} at temperatures betweenT=305.15 K andT=323.15 K using an apparatus composed of a headspace sampler and a normal gas chromatograph. These data were simultaneously evaluated in one step with respect to the (composition dependent, integral) Flory-Huggins interaction parametergby means of a new method which minimizes the Gibbs energy of mixing and does not require chemical potentials. The expression forggiven by Koningsveld and Kleintjens, originally designed for polymer solutions, describes the present results best.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1998-05-01 | The Journal of Chemical Thermodynamics |