Binary mutual diffusion coefficients of aqueous alcohols. Methanol to 1-heptanol
- Univ. of Western Ontario, London, Ontario (Canada). Dept. of Chemistry
Mutual diffusion coefficients, measured by Taylor dispersion at 25 C, are reported for binary aqueous solutions of methanol, ethanol, isomeric propanols and butanols, 1-pentanol, 1-hexanol, and 1-heptanol. Limiting diffusion coefficients (D{sup 0}) for the 1-alkanols are found to decrease with alcohol molar volume V approximately as V{sup {minus}1/2}. Although values of D{sup 0} for aqueous 1-propanol and 2-propanol are nearly identical within experimental error, the limiting diffusion coefficients of the isomeric butanols differ by up to 10% and increase in the order D{sup 0}(2-methyl-2-propanol) < D{sup 0}(2-butanol) {approx} D{sup 0}(2-methyl-1-propanol) < D{sup 0}(1-butanol). The butanol results illustrate the difficulty of predicting accurate diffusion coefficients for aqueous solutions.
- OSTI ID:
- 228018
- Journal Information:
- Journal of Chemical and Engineering Data, Vol. 41, Issue 2; Other Information: PBD: Mar-Apr 1996
- Country of Publication:
- United States
- Language:
- English
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