本文所研究的系統為矽酸乙酯與乙醇兩成份分別在400mmHg以及180mHg兩個壓力下利用汽相循環式汽液平衡裝置進行汽液平衡實驗。兩組實驗數據均可以通過Herington熱力學一致性測試。
同時，針對所得到的實驗數據選擇不同的液相模式進行迴歸, 在本研究中選擇Wilson, UNIQUAC以及UNIFAC三個模式迴歸計算而得到最佳參數。由得到的殘差值判斷，以UNIQUAC模式對於矽酸乙酯與乙醇系統的擬合度較好。
再以統計學的F-分配來比較同組實驗數據用不同的模式迴歸所得到的參數的優劣，比較結果，以UNIQUAC模式最佳。

In this study, the isobaric vapor-liquid equilibrium data for tetraethyl- orthosilicate and ethanol were measured at 400 and 180mmHg using a dynamic recirculating still. The experimental VLE data were proved to pass the thermodynamic consistency test.
The maximum likelihood principle was chosen as regression method to estimate the parameters of Wilson equation, UNIFAC model, and UNIQUAC model. The results of estimation show that the UNIQUAC model correlated with the experimental data has the smallest values of Root-Mean-Square-Deviation (RMSD).
The statistical method of F-test was used to compare the superiority among the above-mentioned models. The result of comparison shows that the UNIQUAC model correlated the experimental data best.

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