从气体吸附率看范德瓦耳斯气体模型的局限性  

On the limitation of Van der Waals gas model from the gas adsorption rate

作　　者：李立本[1] 雷建飞[1] 郝世明[1] 陈庆东[1] 巩晓阳[1] 李新忠[1] 

机构地区：[1]河南科技大学物理工程学院,河南洛阳471023

出　　处：《大学物理》2014年第8期6-7,14,共3页College Physics

基　　金：河南省高等教育教学改革研究项目(2012SJGLX149)资助

摘　　要：利用占据数方法和正则系综理论分别求出了费米气体、玻色气体和范德瓦耳斯气体的化学势,比较了这三种气体与理想气体吸附率的差异.指出:费米气体的吸附率高于理想气体,玻色气体则低于理想气体.存在一个临界温度,高于此温度,用范德瓦耳斯气体描述费米气体不如理想气体模型;低于此温度,用范德瓦耳斯气体描述玻色气体不如理想气体模型.The chemical potentials of Bose, Fermi and Van der Waals gases are obtained by the ensemble theory, and the adsorption rates of the three kinds of gases are compared with that of the idea gas. The adsorption rate of Fermi gas is larger than that of the idea gas, and that of Bose gas smaller than that of the latter. There is a critical temperature. When the temperature is higher than the critical temperature, the model of the idea gas describing the Fermi gas is better than that of the Van der Waals gas. When the temperature is lower than the critical temperature, the model of the idea gas describing the Bose gas is better than that of the Van der Waals gas.

关 键 词：范德瓦耳斯气体 吸附率 临界温度 玻色气体 费米气体 

分 类 号：O414.2[理学—理论物理]