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  • 1
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Measuring Electro Chemical Data at Temperatures up to 300° C under Equilibrium PressuresIn a simple way the potentials of the kalomel and the silver chloride electrodes were measured t temperatures between 20°C and 300°C. The courses of the potentials of these electrodes are reproducible up to a temperature of 200°C. Above 200°C the equilibria of the potential determining reactions are disturbed by the thermal decomposition of kalomel and silver chloride. For electro chemical measurements at higher temperatures the electrode Ag/AgCl/NaClsat is most suitable because its potential varies about 10 mV only between 25°C and 200°C. [E25°C = + 189 mV; E200°C = + 179 ± 2 mV].
    Notes: In einer einfachen Meßeinrichtung wurde der Potentialverlauf der Kalomel-Elektrode und der Silberchlorid-Elektrode bei einer von 20°C bis 300°C steigenden Temperatur gemessen. Es wurde festgestellt, daß der Potentialverlauf dieser Elektroden bis zu 200°C reproduzierbar ist. Oberhalb 200°C wird das Gleichgewicht der potentialbestimmenden Reaktion durch eine Wärmezersetzung von Kalomel und Silberchlorid gestört. Für die elektrochemischen Messungen bei höheren Temperaturen ist bestgeeignet die Elektrode Ag/AgCl/NaClsaf, deren Potential sich im Temperaturbereich 25°C bis 200°C nur um etwa 10 mV ändert [E25°C = + 189 mV; E200°C = + 179 ± 2 mV].
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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