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  • Books
  • Articles  (3)
  • Thermal diffusion  (3)
  • 1985-1989  (3)
  • 1940-1944
  • 1
    Electronic Resource
    Electronic Resource
    Thermal diffusion in solutions containing two or more solute species in equilibrium: The Wagner effect (1987)
    Springer
    Journal of solution chemistry 16 (1987), S. 973-983 
    Details
    ISSN: 1572-8927
    Keywords: Thermal diffusion ; Reaction equilibrium ; the Soret Effect ; the Wagner Effect
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract An exact thermodynamic treatment of the Wagner effect, thermal diffusion in solutions containing two or more species in equilibrium, is given. We consider primarily a solution in which the solute can exist as a monomer A or an n-mer A n . Both A and A n are treated as independent solute species. We do not assume that the solution is ideal or dilute. The heat of transport has been derived. It consists of two parts; one due to the intrinsic heat of transport of the species in the system and the other, due to chemical reaction. We found that the heats of transport derived from the Soret and Dufour effects are identical. Accordingly, the reciprocity relation is confirmed for the Onsager phenomenological coefficient for heat-matter coupling.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00652582
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  • 2
    Electronic Resource
    Electronic Resource
    Thermal diffusion of dilute aqueous NH4Cl, Me4NCl, Et4NCl,n-Pr4NCl, andn-Bu4NCl solutions at 25°C (1988)
    Springer
    Journal of solution chemistry 17 (1988), S. 1-13 
    Details
    ISSN: 1572-8927
    Keywords: Thermal diffusion ; Soret effect ; heat of transport ; entropy of transport ; ammonium chloride ; tetraalkylammonium chloride
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The Soret effect (thermal diffusion) of dilute aqueous solutions of NH4Cl, Me4NCl, Et4NCl, n-Pr4NCl, and n-Bu4NCl has been investigated potentiometrically using the silver, silver chloride thermocell. The molar entropies (heats) of transport have been derived from the initial and final thermoelectric powers. The concentration dependence of the entropy of transport has been examined and the effect of the ionic size on the heat of transport is discussed. The molar entropy of tetrabutylammonium chloride exhibits a sharp minimum in the neighborhood of 0.002M, the reason of which is as yet unclear.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00651849
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  • 3
    Electronic Resource
    Electronic Resource
    Thermal diffusion of dilute aqueous Na2MgEDTA and Na2CaEDTA solutions at 25°C (1988)
    Springer
    Journal of solution chemistry 17 (1988), S. 83-94 
    Details
    ISSN: 1572-8927
    Keywords: Thermal diffusion ; Soret effect ; Soret coefficient ; complex ions ; entropy of transport
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The Soret effect in dilute aqueous solutions (0.01–0.1m) of Na2MgEDTA and Na2CaEDTA is investigated using the flow-cell method. The Soret coefficients obtained from thermal diffusion experiments conducted at 25°C are reported. Heats of transport have been estimated based on the Debye-Hückel theory and the molar entropies of transport, calculated. Results of the present work have been compared with the Soret data for MgCl2 and CaCl2. It is suggested that the solvent exchange effect may account for the differences in the Soret effect observed between the pairs (Mg+2, Ca+2) and (MgEDTA−2, CaEDTA−2).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00651856
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