Abstract The Gibbs energy of Formation data for crystalline hydrates, ΔGf(MpXq.nH2O, T/K, c) and the corresponding “parent” salt, ΔGf(MpXq, T/K, c) are related by the Thermodynamic Difference Rule (TDR): ΔGf(MpXq.nH2O, T/K, c)/kJ mol–1 ≈ΔGf(MpXq, T/K, c)/kJ mol–1 + [0.1994 (T/K) – 302.95] n which predicts values of either ΔGf(MpXq.nH2O, T/K, c) or ΔGf(MpXq, T/K, c) from known values of either ΔGf(MpXq, T/K, c) or ΔGf(MpXq.nH2O, T/K, c) respectively, usually to within experimental error and applies for the temperature range: 298.15 ≤ T/K ≤ 900.

中文翻译：

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适用于以下温度范围的吉布斯形成能值的热力学差异规则：298.15 ≤ T/K ≤ 900

摘要 结晶水合物的吉布斯形成能数据 ΔGf(MpXq.nH2O, T/K, c) 和相应的“母体”盐 ΔGf(MpXq, T/K, c) 通过热力学差分规则 (TDR) 相关联): ΔGf(MpXq.nH2O, T/K, c)/kJ mol–1 ≈ΔGf(MpXq, T/K, c)/kJ mol–1 + [0.1994 (T/K) – 302.95] n 预测值ΔGf(MpXq.nH2O, T/K, c) 或 ΔGf(MpXq, T/K, c) 从已知值 ΔGf(MpXq, T/K, c) 或 ΔGf(MpXq.nH2O, T/K , c) 分别通常在实验误差范围内，适用于温度范围：298.15 ≤ T/K ≤ 900。