预测不同温度下有机纯质汽化热的新方程  

New equation of ΔH_(bi)for organic compound at different temperature

作　　者：张宇英[1] 张克武[1] 

机构地区：[1]东北师范大学化学学院

出　　处：《化工学报》2005年第12期2259-2264,共6页CIESC Journal

基　　金：国家自然科学基金项目(29746002).~~

摘　　要：阐明Watson公式的不足和缺陷,应用分子热力学理论揭示出液体的汽化热取决于液体的分子间相互作用力,导出预测不同温度下有机纯质汽化热的新方程,其物理意义明确.经用39种结构类型的310个实验值检验,平均误差0.69%.Watson式为3.06%,本法的精度比Watson式高4.4倍以上.Heat of vaporization of liquid is very important thermodynamic data for research and many applications in chemical engineering. After analyzing the drawbacks of the Watson＇s equation for estimating △AHbi, a new equation was proposed from the viewpoint of molecular thermodynamics theory and the equation of heat of vaporization at Tb. The physical meaning of Eq. （5） was clear and definite. The average error of Eq. （5） was 0. 69% for 310 experiment values. The applicable temperature range was large, from near melting point to near critical point. The accuracy of the equation was over 4.4 times higher than that of Watson＇s equation for 39 structural types such as alcohol, aldehyde, ketone, ether, amine, pyrrole, pyridine, and so on, in chemical engineering, especially petrochemical engineering and fine chemicals.

关 键 词：液体汽化热 液体分子间力的相对值 

分 类 号：O621.3[理学—有机化学] O621.24[理学—化学]