大学化学 >> 2020, Vol. 35 >> Issue (9): 115-119.doi: 10.3866/PKU.DXHX201908035

化学实验 上一篇    下一篇

纯液体饱和蒸气压测定实验的改进

李慎新(), 王涛, 蒋维东(), 李婷, 李玲玉, 梁小龙   

  • 收稿日期:2019-08-27 录用日期:2019-11-25 发布日期:2019-12-02
  • 通讯作者: 李慎新,蒋维东 E-mail:lsx1964@sina.com;jwdxb@163.com
  • 基金资助:
    四川省教育厅高等教育人才培养质量和教学改革项目(JG2018-558);四川轻化工大学教学改革研究项目(JG-1824);四川轻化工大学教学改革研究项目(JG-1825)

Improvement of the Measurement of Saturated Vapor Pressure of Pure Liquids

Shenxin Li(), Tao Wang, Weidong Jiang(), Ting Li, Lingyu Li, Xiaolong Liang   

  • Received:2019-08-27 Accepted:2019-11-25 Published:2019-12-02
  • Contact: Shenxin Li,Weidong Jiang E-mail:lsx1964@sina.com;jwdxb@163.com

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摘要：

对纯液体饱和蒸气压测定实验进行了装置创新设计，该装置解决了该实验的一些关键问题：保证相平衡时的气相为纯液体蒸气；准确测定相平衡时的温度；方便有效地调节外压与液体蒸气压相等。改进后的装置设计合理，操作简单、快捷，消除了安全隐患，大大缩短了实验时间，可一人单独操作。

关键词: 饱和蒸气压, U形等压计, 等压调节, 装置优化。

Abstract:

The measurement of saturated vapor pressure of pure liquid has been improved by designing a novel apparatus. The pure liquid vapor at phase equilibrium could be obtained, and the temperature of phase equilibrium could be accurately measured. In addition, the balance between the internal pressure and external pressure could been conveniently adjusted. The improved method is simple, rapid, easy operate, time-saving and safe.

Key words: Saturated vapor pressure, U-shaped isobarometer, Isobaric control, Apparatus optimization