引用本文:
冯祥明, 郑金云, 曹若宇, 李丹, 关新新, 李朝辉, 陈卫华, 张建民. 范德华气体的节流膨胀与热力学函数的可视化[J]. 大学化学,
2026, 41(7): 401-405.
doi:
10.12461/PKU.DXHX202506002
Citation: Xiangming Feng, Jinyun Zheng, Ruoyu Cao, Dan Li, Xinxin Guan, Zhaohui Li, Weihua Chen, Jianmin Zhang. Visualization of throttling expansion and thermodynamic functions for Van der Waals gases[J]. University Chemistry, 2026, 41(7): 401-405. doi: 10.12461/PKU.DXHX202506002
Citation: Xiangming Feng, Jinyun Zheng, Ruoyu Cao, Dan Li, Xinxin Guan, Zhaohui Li, Weihua Chen, Jianmin Zhang. Visualization of throttling expansion and thermodynamic functions for Van der Waals gases[J]. University Chemistry, 2026, 41(7): 401-405. doi: 10.12461/PKU.DXHX202506002
范德华气体的节流膨胀与热力学函数的可视化
English
Visualization of throttling expansion and thermodynamic functions for Van der Waals gases
Abstract:
The visualization of physical chemistry formulas significantly enhances students’ comprehension and mastery of relevant concepts, while the application of appropriate data processing software simplifies the visualization process. This study employs nitrogen gas as an example, utilizing the Van der Waals equation and Joule-Thomson coefficient formula to construct three-dimensional representations of pV-(p,T), T-(p,T0), and μJ-T-(p,T) relationships. These visualizations facilitate more intuitive instruction regarding the throttling expansion effects in real gases. Furthermore, through the μJ-T-(p,T) and V-(p,T) plots, we demonstrate both the gas liquefaction process and engineering methods for calculating ΔH, ΔS, and ΔG of Van der Waals gases under isothermal conditions.
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