Journal of Solution Chemistry

, Volume 17, Issue 1, pp 1–13 | Cite as

Thermal diffusion of dilute aqueous NH4Cl, Me4NCl, Et4NCl,n-Pr4NCl, andn-Bu4NCl solutions at 25°C

  • Christian J. Petit
  • Ming-Hwa Hwang
  • Jeong-long Lin
Article

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.

Key words

Thermal diffusion Soret effect heat of transport entropy of transport ammonium chloride tetraalkylammonium chloride 

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Copyright information

© Plenum Publishing Corporation 1987

Authors and Affiliations

  • Christian J. Petit
    • 1
  • Ming-Hwa Hwang
    • 1
  • Jeong-long Lin
    • 1
    • 2
  1. 1.Department of ChemistryBoston CollegeChestnut Hill
  2. 2.Max-Planck-Institut für ChemieMainzGermany

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