Thermal diffusion studies in dilute aqueous and non-aqueous electrolyte solutions

✍ Scribed by W.A. Hawksworth; A.J. Stiff; C.D. Wood

• Publisher: Elsevier Science
• Year: 1977
• Tongue: English
• Weight: 241 KB
• Volume: 22
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(77)85020-2

✦ Synopsis

The Soret coefficients of 0 .01 aqua-molal (ie 0.01 moles solute per 55 .55 moles solvent) solutions of I : 1 electrolytes in water, methanol, formamide. N-mcthyll'ormamide and dimethyl formatnide have been measured using the conductometric technique . Suitable thermal diffusion cells . machined from Perspex or Nylon-6, formed part of a precision audio-frequency bridge network . Measurements of the temporal regression of the resistance ratio between upper and lower sections of the cell allowed the Sorer coefficients, a, of the solutions to be calculated .

The kinetic theory of Wirtz and Hiby has been applied to these results in order to evaluate the Hemmungsenergie qrr and the Lochbildungsenergie q,, for the diffusion process . The nature of the ion-solvent interactions and the importance of the structure of the solvent in the diffusion process arc discussed in terms of these quantities .