摘要
基于物理化学实验教材"最大气泡法测定液体的表面张力"实验中毛细管与液面相切难控制、毛细管鼓泡速率难控制的缺点提出了改进方案。由注射器代替滴管控制液体加入量,较容易使毛细管与液面刚好相切;采用带活塞的锥形瓶与注射器联用取代滴流瓶控制减压操作气泡形成的速率;用计算机取代人工处理实验数据和绘图。改进后的实验数据准确度和精密度均有所提高。
The improvement is proposed in view of the shortcomings of ＂physical chemistry experiment with maximum bubble pressure method for determination of liquid surface tension＂ in the textbook.The shortcomings include the level tangent of capillary tube with fluid and the fact that the capillary bubble rate are difficult to control.The pipette is replaced by syringe which makes it easier for the capillary tube and the fluid surface just tangent.The formation rate of bubbles is well controlled by union between cone-bottle with piston and syringe instead of trickle bottle in decompression operation.A computer is used to replace the manual processing of experimental data and mapping.The accuracy and precision of experimental data have been improved.
出处
《实验室研究与探索》
CAS
北大核心
2011年第12期31-33,共3页
Research and Exploration In Laboratory
基金
广东工业大学精品课程项目(090044)
广东工业大学教改项目资助项目(2010Y019)
关键词
表面张力
最大气泡法
实验装置
surface tension
maximum bubble method
experimental device
