【摘要】 用evaporation-temperature法测定了MnS₂O₆·2H₂O和MnS₂O₆·4H₂O的分解压力,关联出这两种水合盐的脱水或分解反应的平衡常数与温度的关系式。并利用这些关系式,计算得到MnS₂O₆·2H₂O的△H°_f,△G°_f,S°分别为-1991.2kJ·mol^-1。-1756.0kJ·mol^-1,388.7J·mol^-1·K^-1,MnS₂O₆·4H₂O的△H°_f,△G°_f,S°分别为-2637.2kJ·mol^-1,2251.8kJ·mol^-1,351.5J·mol^-1·K^-1。更多还原

【Abstract】 The dissociation pressures of dihydrate and tetrahydrate of manganese dithionate were measured with evaporation-temperature method,and the equations relating the equilibrium constants and tem+Peratures of dehydration or decomposition reactions of the hydrates were established. Then the enthalpy △H_f^o, Gibbs free energy △G_f^o , and entropy S^o of MnS₂O₆·2H₂O and MnS₂O₆·4H₂O were eatealated by the equations, and the results were-1991.2kJ·mol^-1, -1756.0kJ·mol^-1, 388.7J·mol^-1·K^-1and -2637.2kJ·mol（-1）, -2251.8kJ·mol^-1, 351.5J·mol^-1·K^-1 respectively.更多还原