Abstract:
Research of conductivity of concentrated salt solutions are of great interest in connection with the structural
changes in electrolytes. The heat storage properties of the mixture of sodium thiosulfate pentahydrate and sodium
tellurate dihydrate were calculated. Firstly the coefficients of temperature dependence of heat capacity
of sodium tellurate were calculated. Melting temperature of mixtures at ratios (50:1, 25:1, 10:1), which are
equal to 349 K, 307 K, 326 K, were determined. The specific melting heat of mixtures was calculated. It was
shown, that heat of fusion of mixture Na2S2O3·5H2O — Na2TeO4·2H2O (10:1) is maximal and equals to
238.5 kJ·kg-1. An analysis of the temperature dependence of the electrical conductivity was carried out. It
showed the presence of high activity and mobility of tellurate-ions. It was shown that crystallization process
is changed from quasi-equilibrium to the «explosive» at low temperatures ranging from T=318 K.
