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在本文(Ⅰ)报基础上,应用微扰理论导出了带电离子流体混合物的过量Helmholty自由能计算公式.该公式考虑了体系中溶质—溶剂、溶剂—溶剂和溶质—溶质间所有作用能(包括分子色散能、排斥能、偶极定向能、诱导能、离子静电能、离子偶极能).计算了在25℃下3个加盐混合溶剂体系[H_2O-nC_4H_9OH-MX(NaCl、KCl、KBr)]液液平衡中溶剂的活度系数,并与实验值进行了比较.
On the basis of the paper (I), the formula of Helmholty free energy of excess ionic liquid mixture is deduced by using perturbation theory. The formula takes into account all the functions of solute-solvent, solvent-solvent and solute-solute in the system Molecular dispersive energy, repulsive energy, dipolar orientation energy, induced energy, ionic electrostatic energy, ionic dipole energy) were calculated for three mixed salt systems [H_2O-nC_4H_9OH-MX (NaCl, KCl, KBr )] The activity coefficient of the solvent in the liquid-liquid equilibrium is compared with the experimental value.