Standard Potentials of the Cl2/Cl− Electrode at Various Temperatures with Related Thermodynamic Functions

Abstract

The standard potentials of the Cl2/Cl− electrode have been redetermined over the temperature range 25°–80°C with an accuracy better than ±0.1 mv. The support for the Cl2/Cl− electrode was a tantalum foil coated with a Pt‐Ir 45% alloy, which provided complete resistance to corrosion under the experimental conditions. Thermodynamic functions concerning the reactions: and were calculated. Standard entropy values at 25 °C for and Cl− were obtained which are more accurate than those in the literature.