The Physicochemical Properties of Aqueous Solutions of Sodium Alkanesulfonates. Apparent Molar Volumes, ViscosityBCoefficients, Heats of Solution, and Surface Tensions
| Autor: | Kunio Tamaki, Y\={o}ko Ohara, Masahiro Inabe, Tetsushi Mori, Fumio Numata |
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| Rok vydání: | 1983 |
| Předmět: | |
| Zdroj: | Bulletin of the Chemical Society of Japan. 56:1930-1934 |
| ISSN: | 1348-0634 0009-2673 |
| DOI: | 10.1246/bcsj.56.1930 |
| Popis: | The apparent molar volumes, viscosity B coefficients, heats of solution, and surface activity of sodium alkanesulfonates (RSO3Na, methyl to hexyl) in water were measured. The limiting apparent molar volumes at 25 °C increase with the number of carbon atoms in the alkyl chain; the increment per methylene group is about 16 cm3mol−1. The viscosity B coefficients of MeSO3Na and EtSO3Na increase with the temperature, while those of n-BuSO3Na decrease with an increase in the temperature. The changes in heat capacity for dissolution in water, ΔCpo, as calculated from the heats of solution at 15, 25, and 35 °C, were negative for MeSO3Na and EtSO3Na, while the ΔCpo values for n-PrSO3Na and higher homologs were positive. MeSO3Na raises the surface tension of water, while EtSO3Na and higher homologs reduce it. The structural changes in the solvent water upon the dissolution of sodium alkanesulfonates are discussed in comparison with those of sodium alkyl sulfates previously reported. |
| Databáze: | OpenAIRE |
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