昂尼斯氮气在110K～600K的热力学量  

STUDIES ON THERMODYNAMICS QUANTITIES OF ONNES NITROGEN GAS IN 110K～600K

作　　者：刘国跃[1] 吴英[1] 廖碧涛[1] 

机构地区：[1]绵阳师范学院计算物理研究中心,四川绵阳621000

出　　处：《物理与工程》2015年第5期60-64,共5页Physics and Engineering

基　　金：四川省科技厅资助项目(2013JY0077);绵阳师范学院科研项目(Mnu2012009)

摘　　要：采用氮分子气体系统的第二维里系数B和第三维里系数C的实验数据,用最小二乘法对这两个维里系数随温度的变化规律进行了数值模拟,并给出了拟合后的解析结果;以昂尼斯方程和上述规律为基础,采用热力学方法,在二级近似下,得到了昂尼斯氮气的态函数内能、焓以及可观测的定压摩尔热容量,并将在110K^600K范围内的定压摩尔热容量的计算结果与可查找的实验数据进行了比较,相应的百分误差表明,昂尼斯方程导致的结果与实验数据符合得很好.The change laws of second and third virial coefficients Band Cof nitrogen gas with the temperature are simulated with the least square method using of experimental Band Cdata.The fitting analytical result is also given.On the basis of the laws and Onnes equation,under the condition of secondary approximation at temperature area（110K^600K）,the state functions of the internal energy,enthalpy and entropy,the difference value of molar heat capacity in constant pressure and molar heat capacity in constant volume are studied using thermodynamics method.The molar heat capacities in constant pressure are compared with experiment data.The corresponding percentage errors show that the molar heat capacities in constant pressure are agreement with experiment data.

关 键 词：昂尼斯氮气 第二维里系数 第三维里系数 数值模拟 热力学性质 

分 类 号：O414.1[理学—理论物理]