【摘要】 在界面化学位的基础上，定义了组分的界面逸度系数，推导出一个新的液体混合物表面张力的表达式，同时用Ｐｅｎｇ－Ｒｏｂｉｎｓｏｎ状态方程计算液体混合物体相和表面相组分的逸度系数，从而实现了由状态方程计算液体混合物表面张力。文中用这一新模型计算了５６个二元体系的表面张力，平均相对偏差为３．３８％，说明该方法是可行的。更多还原

【Abstract】 Based on the surface chemical potential and Peng Robinson equation of state,a new model is proposed to predict or correlate the surface tension of binary liquid mixtures.Using this method,the surface tension for 56 binary systems were calculated with total relative deviation 3.38% and 1.41% for prediction and correlation respectively.These results show that the model driven by this paper is simple,reliable and accurate.At the same time,this approach can be extended to calculate multicomponent system surface tension of liquid mixture.更多还原