大学化学 >> 2022, Vol. 37 >> Issue (7): 2109096.doi: 10.3866/PKU.DXHX202109096

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以p, Vm为参数的范德华气体的焦耳-汤姆逊系数及μJ-T-p-T图像

冯祥明(), 郑金云, 陈卫华, 关新新, 张建民   

  • 收稿日期:2021-09-28 录用日期:2021-10-26 发布日期:2021-11-19
  • 通讯作者: 冯祥明 E-mail:fengxm@zzu.edu.cn
  • 作者简介:冯祥明, Email: fengxm@zzu.edu.cn
  • 基金资助:
    2020河南省本科高校课程思政项目郑州大学《物理化学课程思政教学团队》

Joule-Thomson Coefficient of van der Waals Gas Based on p, Vm and 3D μJ-T-p-T Profile

Xiangming Feng(), Jinyun Zheng, Weihua Chen, Xinxin Guan, Jianmin Zhang   

  • Received:2021-09-28 Accepted:2021-10-26 Published:2021-11-19
  • Contact: Xiangming Feng E-mail:fengxm@zzu.edu.cn

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摘要：

现有主要物理化学参考资料中较少讨论状态参数对范德华气体节流膨胀的影响，因此本文以压力和体积(p, Vm)为参数初步讨论了范德华气体的焦耳-汤姆逊系数μJ-T，并在此基础上，以氮气为例，利用范德华方程将p, Vm参量转变为p, T参量，得到了μJ-T-p-T三维图像和二维等高图，更直观地反映了状态参数p, T对μJ-T的影响。

关键词: 节流膨胀, 焦耳-汤姆逊系数, 范德华气体

Abstract:

The effect of state parameters on Throttling Expansion is less investigated in the current tutorials of physical chemistry. Therefore, Joule-Thomson coefficient containing p, Vm was rudimentarily discussed based on van der Waals gas. Taking Nitrogen gas as an example, 3D μJ-T-p-T profile and 2D contour map were further plotted by converting independent variables p, Vm into p, T by means of van der Waals equation to reflect the dependence of μJ-T on p, T more intuitively.

Key words: Throttling expansion, Joule-Thomson coefficient, van der Waals gas