Abstract
Using a hydrogen-electrode thermocell with a temperature difference of 8 K, the initial thermoelectric power ɛin has been determined for aqueous NaOH solutions from 0.003 to 0.2 molal at mean temperatures of 25 and 15°C. Graphs of a function of ɛin vs. a function of m1/2 yield infinitedilution limiting slopes as m1/2 → 0 which are shown to be in agreement with the five-term theory of this laboratory. Extrapolation of these curves to infinite dilution yields the value for the standard transported entropy of the hydroxide ion\(\bar \bar S^ \circ (OH^-- ) = 68.8 \pm 0.3J{\text{ - }}K^{ - 1} \).
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Payton, A.D., Brucker, M.J. & Zhang, Y. Concentration dependence of thermoelectric power of aqueous sodium hydroxide solutions using hydrogen electrodes. J Solution Chem 22, 995–1003 (1993). https://doi.org/10.1007/BF00647723
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DOI: https://doi.org/10.1007/BF00647723