Thermal diffusion of tetrabutylammonium salts in aqueous solution at 25°C |
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| Authors: | Hui Lü Derek G. Leaist |
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| Affiliation: | (1) Department of Chemistry, University of Western Ontario, N6A 5B7 London, Ontario, Canada |
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| Abstract: | A conductimetric technique is used to measure the Soret coefficients of dilute aqueous solutions of tetra-n-butylammonium (NBu4) chloride, bromide, iodide and thiocyanate at 25°C and salt molalities from 0.0005 to 0.02 mol-kg–1. Entropies of transport calculated from the Soret coefficients pass through minima near 0.001 mol-kg–1 for NBu4I and NBu4SCN, and near 0.003 mol-kg–1 for NBu4Cl and NBu4Br. The results for NBu4Cl are in good agreement with those obtained by Lin et al. from thermocell measurements. |
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| Keywords: | Soret coefficient entropy of transport thermal diffusion tetrabutylammonium salts, aqueous |
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