【摘要】 文章通过问卷调查的方式总结了化工专业传统气体PVT关系测定实验存在的问题，并有针对性地设计了一种更具启发性的虚拟仿真实验，从氦气等难以液化的气体的PVT数据出发，利用数学软件回归范德华方程的参数a和b,由此计算相应气体的临界温度和分子大小。教学实践表明，所设计的虚拟仿真实验有助于学生认识到范德华方程在气体液化发展过程中的重要作用，也有助于提高学生对化工热力学知识的学习兴趣。更多还原

【Abstract】 Based on the results of the questionnaire survey, this article analyzes the problems existing in the traditional PVT measurement experiment of chemical engineering, and designs a more instructive virtual simulation experiment. Starting from the PVT data of He and other gases that are difficult to liquefy, the mathematical software is used to regression the parameters of a and b in the vdW equation, from which the critical temperature and molecular size of the corresponding gas are calculated. The teaching practice results show that the virtual experiment can not only make students realize the important role of the vdW equation in the development of gas liquefaction, but also improve students’ interest in learning chemical thermodynamics.更多还原