Abstract
Abstract Measurements of the electromotive force (EMF) for liquid Na-Ga and Na-Cd mixtures have been made up to 630°C and 700 bar by using β-alumina as a separator. The pressure variations of thermodynamic quantities, such as free energy, enthalpy and entropy, etc., are obtained. The concentration variation of the molar volume of mixing is deduced from the relative partial molar volume determined directly from the pressure derivative of the EMF. The concentration fluctuations for both mixtures are large in the Na-rich concentration range and diminish considerably by a slight application of pressure. The difference of the pressure effect on the concentration fluctuations between the liquid Na-Ga and Na-Cd mixtures is discussed.
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