范德瓦尔斯系数随温度的改变及其对热容量的影响  

The Change of Van De Waals Coefficients with Temperature and Its Influence on Heat Properties

作　　者：刘国跃[1] 

机构地区：[1]绵阳师范学院物理与电子工程学院,四川绵阳621000

出　　处：《安徽师范大学学报（自然科学版）》2010年第6期547-550,共4页Journal of Anhui Normal University(Natural Science)

基　　金：四川省教育厅重点科研项目(08ZA164)

摘　　要：采用热力学方法,分析了在400K-2500K的温度范围内范德瓦尔斯系数a、b随温度发生改变的近似规律,分析了范德瓦尔斯系数随温度发生改变对热容量的影响,以氮气为例,对相关问题进行了讨论,并将结果与理想气体行为和已有的实验数据进行了比较.结果表明,在讨论的温度范围区,相互作用的影响仍然存在,范德瓦尔斯系数随温度变化有较好的线性规律;系数a和数b随温度发生改变对热容量修正的贡献不同,但随着温度升高,这两种修正都逐渐变得微弱.Based on the thermodynamics method,approximate rule in the changes of Van De Waals coefficients in the temperature region 400K-2500K and the effect on heat properties with temperature are studied.The problems related in nitrogen are discussed,too,and compared with ideal gas.The results show that there is still the influence from the intermolecular interaction in the given temperature region,the change of Van De Waals coefficients are better liner relations with temperature.The influences from coefficient a and b are different.As the temperature is higher,the influences are all lower.

关 键 词：范德瓦尔斯系数 摩尔热容量 

分 类 号：O414[理学—理论物理]