摘要
用evaporation-temperature法测定了MnS_2O_6·2H_2O和MnS_2O_6·4H_2O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MnS_2O_6·2H_2O的△H°_f,△G°_f,S°分别为-1991.2kJ·mol^(-1)。-1756.0kJ·mol^(-1),388.7J·mol^(-1)·K^(-1),MnS_2O_6·4H_2O的△H°_f,△G°_f,S°分别为-2637.2kJ·mol^(-1),2251.8kJ·mol^(-1),351.5J·mol^(-1)·K^(-1)。
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 MnS_2O_6·2H_2O and MnS_2O_6·4H_2O were eatealated by the equations, and the results were-1991.2kJ·mol^(-1), -1756.0kJ·mol^(-1), 388.7J·mol^(-1)·K^(-1)and -2637.2kJ·mol(-1), -2251.8kJ·mol^(-1), 351.5J·mol^(-1)·K^(-1) respectively.
出处
《广西大学学报（自然科学版）》
CAS
CSCD
1992年第2期1-6,共6页
Journal of Guangxi University（Natural Science Edition）
