含氧酸盐的生成热可以表达为组分氧化物的生成热和它们间反应热之和: ΔH_(f,M_mYO_(n+1))=ΔH_(f.M_mO)+ΔH_(f,YO_n)+H_R 用作者以前提出的“金属离子的生成能参数”W_f的概念,反应热H_R可由下式计算: H_R=aW_f+b其中a,b是决定于含氧酸酸性的常数。 用此公式计算了205种含氧酸盐,若干复杂硅酸盐及某些含氧酸盐在高温时的生成热,其结果与实验值较为相符。 同时还讨论了含氧酸盐热稳定性和热分解温度的规律性。
The heat of formation of oxyacid salt, △H_f°.M_mYO_(n+1), may be expressed bysumming up the heat of formation of individual component oxide, △H°_(f[m_mO]) and△H_(f,YO_n) and the heat of reaction evolved in the combination of its componentoxides, H_R, thus: △H_(f.M_nYO_(n+1))=△H_(f,M_mO)+△H_(f,YO_n)+H_R Using the "parameter of formation energy of metallic ion, W_f", previouslysuggested by the authors, the heat of reaction, H_R, may be calculated as:H_R=αW_f+b, where α and b are constants depended upon acidity of oxyacid. A great deal of examples of 205 oxyacid salts, some complex silicate mineralsand a few salts under high temperatures, their heats of formation have been cal-culated by this simplified formula in order to ascertain their heats of formation,the results obtained agree well with experiments. The thermal stability and decomposition temperature, T_d, of oxyacid salts havealso been briefly discussed.
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