Abstract: A kind of equation which predicts heat of vaporization of pure compounds at normal boiling point has been developed by combining the concept of residual function with Clapeyron equation and Pitzers three-parameter general relation and the Edmister equation A° = 0.1664θ4.2-0.02587 A = 0.8940θ4.2- 1.097θ1.6- 0.056 Only the fundamental data Tb, Tc, Pc are involved in the equation. Vaporization heat data of 390 compounds were predicted with a mean deviation 2.0% compared with the experimental data. The equation is generally applicable for engineering calculation available.

摘要： 本文根据化工热力学原理把剩余函数概念扩展到用于纯物质的汽化热,引入Clapeyron方程式和Pitzer三参数对比状态普遍化关系式,再代入Edmister方程式,推导出纯物质常沸点汽化热的新计算方程式.应用该方程式,由最基本的物性数据T_b、T_c和P_c,预测了390种各类物质的常沸点汽化热,与文献实验值相比较,总的绝对平均误差为2.0%.