大学化学 >> 2016, Vol. 31 >> Issue (3): 49-54.doi: 10.3866/PKU.DXHX20160349

化学实验 上一篇    下一篇

新型调压装置在液体饱和蒸气压测定实验中的应用

龚楚清*(),邓媛,邓立志,夏春兰   

  • 发布日期:2016-04-06
  • 通讯作者: 龚楚清 E-mail:gongcq@whu.edu.cn

The Application of New Gas Pressure Adjustment Device in the Experiment on Saturated Vapor Pressure Measurements

Chu-Qing GONG*(),Yuan DENG,Li-Zhi DENG,Chun-Lan XIA   

  • Published:2016-04-06
  • Contact: Chu-Qing GONG E-mail:gongcq@whu.edu.cn

摘要:

引入可控进气量和具有独立操作的增、减压缓冲瓶的调压装置,使气压调节缓慢可控,能连续调节缓冲瓶内气体压力以适应不同温度点的液体饱和蒸气压;可通过控制U形液柱缓慢移动来读取气液平衡状态下饱和气压值,较好地克服了以往实验中存在的调压操作困难、易发生空气倒灌及未知蒸气饱和的问题,取得了良好的实验效果,提高了实验数据的准确性。

关键词: 物理化学实验, 液体饱和蒸气压, 气液平衡

Abstract:

By introducing two gas buffer vessels, one for increasing pressure and the other for decreasing pressure, which can be operated independently, a new apparatus was established on the adjustment of gas pressure through controlling of air input. It was easy to control the gas pressure of buffer vessel continuously following the variation of vapor tension in different temperatures. Experimental data can be obtained when the gas and liquid are in equilibrium by manipulating the slow move of U shape liquid. This system has achieved satisfactory effects in the application for its advantages on easiness in operation, stability and data accuracy, etc.

Key words: Physicochemical experiment, Saturated vapor pressure of liquid, Gas-liquid equilibrium

MSC2000: 

  • O64