The correlation between the thermodynamic functions of molten binary systems of alkali metals

Differential thermodynamic equations are used to reveal, in the general form, the correlation between some excess thermodynamic functions of liquid solutions. It is demonstrated that a certain correlation is observed in wide ranges of temperature and concentrations between the calculation and experimental data on excess molar enthalpy and specific volume of molten $\mathrm{Na}$–$\mathrm{K}$ and $\mathrm{K}$–$\mathrm{Cs}$ systems.