测纯物质常沸点汽化热的一种改进方法

AN IMPROVED METHOD FOR PREDICTING HEAT OF VAPORIZATION OF PURE COMPOUNDS AT NORMAL BOILING POINTS

应用八十年代提出的新R-K状态方程式,改进纯物质常沸点汽化热的剩余函数预测法,推导出纯物质常沸点汽化热的新计算方程式。并应用该方程式,由最基本的物性数据T_b,T_c和P_c,预测了400种各类物质的常沸点汽化热,与实验值比较,预测准确度优于其它方程。

A new equation for calculating heat of vaporization of pure compounds at normal boiling points is derived with the residual function method improved by the new RK EOS which was proposed in 1980s. The data of heat of vaporization of 400 kinds of pure compounds are predicted at normal boiling points by the equation which involves only the T_b, T_c and P_c parameters. The results predicted, compared with the experimental data, are more accurately than those by other equations.