1991) Abstract-The activity ccefficients of silver nitrate in binary melts of AgNO,-KNO, were determined by ernfmeasurements in a formation eel1 consisting of a silver and a nitrate electrode, in a temperature. range of 513-583 K and in the concentration range allowed by the melting point of the mixture. Using a polynomial expression of the excess chemical potential, the excess Gibbs function and the characteristic constants of the investigated binary molten salt system were calculated. The excess molar entropy was calculated by combining the excess Gibbs function with calorimetric data on the excess enthalpy

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Of silver nitrate-potassium nitrate melts