Thermodynamic Investigation of the Reaction: by Electromotive Force Measurements

The thermodynamic properties of the system CoO–CoSO4 have been investigated over the temperature range 560 to 916 °C, by an electrochemical method using a ZrO2–CaO solid electrolyte and an oxygen reference electrode. The standard free energy change for the reaction[Formula: see text]can be expressed by[Formula: see text]and is given with an accuracy of ± 400 cal.