Molar heats of transport of dilute aqueous HCl solutions: A potentiometric study

Lin, Jen-Chieh; Bierlein, James A.; Becsey, Julius G.

doi:10.1007/bf00645688

Cited by 13 publications

(1 citation statement)

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“…[4] results in Q*~ = 13.55 + 0.39 kJ/mol. The value Q*~ = 14.16 --+ 0.09 kJ/mol ofLin et al (7), which was determined from a linear least squares analysis of their four most-dilute data points for the enthalpy of transport vs. c 1~2, was then combined with Q*~ to determine Q*~ = 0.61 -0.40 kJ/mol. At 25~ this results in (hQ*~ = 12.94 + 0.56 kJ/mol, which was assumed to remain constant at 15~ Our values for the five terms and their slope contributions are presented in Table I.…”

Section: Theoretical Considerationsmentioning

confidence: 99%

A Further Comparison of Theoretical and Experimental Limiting Slopes for the Concentration Dependence of Thermoelectric Powers in Aqueous Hydrochloric Acid at 25° and 15°C

Payton

Eubanks

Feller

et al. 1990

J. Electrochem. Soc.

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Using hydrogen-electrode thermocells, the initial thermoelectric power (TEP) in aqueous HC1 solutions has been measured at mean temperatures of 25 ~ and 15~ from 0.001 to 1.1M. The TEPs at c < 0.01M have been plotted vs. c ~2 to determine infinite-dilution limiting slopes. These experimental slopes have been compared with theoretical slopes calculated from our "five-term" theory.Investigation of the concentration dependence of initial thermoelectric powers (TEP) for hydrogen-electrode thermoceUs with aqueous HC1 solutions has continued in this laboratory using improved apparatus. The TEPs have been measured at concentrations ranging from 0.001 to 1.1M, using a temperature difference of 10 K at mean temperatures of 25 ~ and 15~ The measured TEPs (corrected by the mass-action term) have been plotted vs. c ~. The experimental limiting slopes have been determined from runs with concentrations less than 0.01M.In the next section we describe the theoretical concentration dependence of the TEPs and calculate the theoretical limiting slopes based on the "five-term" theory developed in this laboratory. We continue with a description of the new experimental procedure and results, concluding with a comparison of theoretical and experimental limiting slopes.

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Section: Theoretical Considerationsmentioning

confidence: 99%