纯物质偏心因子新推算式

基于纯物质液态分子的汽化过程类似于气体在固体表面上的吸附过程,用统计热力学的理论推导出偏心因子方程。将有机化合物分为8类,经用464种化合物的文献值比较,各类的误差平均值在1.41～2.86％。证明该方程具有形式简单,推广性好的优点。计算结果有七类的误差小于Lee—kesler式和Edmister式。

A New Acentric-Factor Formula for a pure Compound

Since the process of vaporization of pure liquid molecues is similar to the one of adsorption of gas molecules on the surface of a solid, we come up with a new acentric-factor formula for a pure compound by theory of statistical thermodynamics With organic chemical compounds divided into 8 classes, the average values of the errors of each class are between 1.41—2.86%, compared with literature values of 464 kinds of chemical compounds. The calculating results show that the errors of 7 classes are less than that of Lee-kesler and Edmister. These prove the formula has an advantage of simple pattern and ecan be asily popularized.