Relationship Between Electrical Conductivity and Thermodynamic Properties of Binary Molten Salt Mixtures

Electrical conductivity is a physical property reflecting the abili ty of a matter to transfer electrical charge. In molten salts conductance is due to ionic mobili ty which depends on many factors but the mostly the size of ions and ionic bond strength. In order to consider the specific conductance change with the size of cation in systems with the same anion we can take reciprocal molar volume as an integral characteristic of the size. As one can see on fig 1 there is a straight line in coordinates ln χ1/V for molten halides at constant temperature, except fluorides. For molten chlorides the expession is :