The significant structure theory of liquids has been successfully applied to solution systems and homogeneous nucleation theory. In solution system, the solutes are regarded as having only the solid-like degree of freedom and solvated with solvent molecules.
In the application of the theory to aqueous NaCl solution, the partition function is composed of the partition function for water and that for salt. And also the excess free energy term derived from Debye-H$\ddot{u}$ckel theory is added. The thermodynamic properties such as molar volume, vapor pressure, entropy of vaporization, and heat capacity as well as the dielectric constant are calculated over the whole concentration and wide temperature range. The agreement between the theory and experiment is satisfactory.
In applying the theory to sodium ammonia solution, we assumed there were four species, i.e., sodium cation, solvated electron, triple-ion, and free electron and equilibria existed between them. Upon these assumptions, we have set up the model explaining the anomalous properties of sodium ammonia solution qualitatively and also quantitatively as well. In the same manner with the aqueous NaCl solution, the partition function for sodium ammonia solution is composed of the partition functions for the four species and also for the Debye-H$\ddot{u}$ckel excess free energy term. Agreements between calculated and experimental values of the thermodynamic quantities, such as molar volume, vapor pressure, partial molar enthalpy and entropy, and chemical potential as well as viscosity are quite satisfactory.
In the case of homogeneous nucleation theory, surface tensions, chemical potentials, and densities of various liquids such as argon, nitrogen, helium, ammonia, and water are calculated from the previously well known partition functions. And using these calculated values, the critical supersaturation ratios and radii of the above materials are determined according to the classical Becker-D$\ddot{o}$ring and the revised Lothe-Pound theories. The results were compared with the available experimental values and agreed well.
액체의 특성구조이론(significant structure theory of liquids)의 입장에서, 용액계의 열역학적 성질과 핵 생성 이론에 대해 연구하였다. 용액계에서 용질은 용매화되었고, 고체와 같은 자유도만을 갖는다고 간주하였다.
NaCl 수용액에서, 용액의 분배함수는 물과 NaCl의 분배함수로 구성하였고, Debye-H$\ddot{u}$ckel의 이론에 따르는 excess free energy term도 고려하였다. 이러한 분배함수로부터 몰부피, 증기압, 증발 엔트로피, 비열, 유전상수 등을 여러 온도와 전 농도범위에 걸쳐서 계산하였고, 실험치와 비교하여 잘 일치하였다.
Sodium암모니아 용액에는 네 종류의 용질이 있고, 이들 사이에는 평형이 존재한다고 가정하여, sodium암모니아 용액의 이상한 성질들을 정성적으로나 정량적으로 잘 설명할 수 있는 model을 세웠다. 분배함수는 NaCl 수용액에서와 마찬가지로, 네 종류의 용질의 분배함수로 구성하고, Debye-H$\ddot{o}$ckel의 excess free energy term을 고려하였다. 몰 부피, 증기압, 분 몰 엔탈피와 엔트로피, 화학퍼텐셜, 점도 등을 계산하였고, 실험치와 비교할 때 잘 일치함을 보였다.
핵 생성이론에서는, 액체의 특성 구조이론을 적용하여, 아르곤, 질소, 헬륨, 암모니아와 물 등의 표면장력, 밀도, 화학 퍼텐셜 등을 계산하여, Becker-D$\ddot{u}$ring 이론과 Lothe-Pound 이론에 따르는 임계과포화비율과 임계반경을 계산하였다. 계산된 결과는 지금까지 알려진 사실과 잘 부합하였다.
