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对苯酚+环己酮低温固液平衡体系,直接由相图和基本热力学数据,计算体系热力学性质。使用Gibbs-Duhem方程和四参量GE方程,在220.00～241.00K区间,计算了8个温度的两组元活度系数和GE方程,在241.00K,x2=0.5、GE=783.69J/mol,SE=97.11/(mol.K),HE=24186.69J/mol。241.00K相合熔点化合物的离解平衡ΔrGm=1982.93J/mol,ΔrHm=5753.241J/mol,ΔrSm=15.65J/(mol.K)。体系偏离于规则溶液模型。在化合物存在相区,离解反应的反应焓变和熵变均可视之为常量。液相区不会存在稳定的化合物。
For the low temperature solid-liquid equilibrium system of phenol + cyclohexanone, the thermodynamic properties of the system were calculated directly from the phase diagram and the basic thermodynamic data. The Gibbs-Duhem equation and the four-parameter GE equation were used to calculate the activity coefficients and GE equations of two components at the temperature of 220.00-241.00K at 241.00K, x2 = 0.5, GE = 783.69J / mol, SE = 97.11 / (mol.K), HE = 24186.69 J / mol. The dissociation equilibrium ΔrGm = 1982.93J / mol, ΔrHm = 5753.241J / mol, ΔrSm = 15.65J / (mol.K) for the 241.00K matched melting point compound. The system deviates from the regular solution model. The presence of compounds in the phase region, the dissociation reaction enthalpy and entropy change can be regarded as a constant. There is no stable compound in the liquid phase.