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An inexpensive gas effusion apparatus for the introductory laboratory

 

作者: Joseph C. Amato,   Roger E. Williams,  

 

期刊: American Journal of Physics  （AIP Available online 1991）
卷期: Volume 59, issue 4  

页码: 346-349

 

ISSN:0002-9505

 

年代: 1991

 

DOI:10.1119/1.16547

 

出版商: American Association of Physics Teachers

 

关键词: MOLECULES;BENCH−SCALE EXPERIMENTS;VELOCITY;GASES;DIFFUSION;PUMPS

 

数据来源: AIP

 

摘要:

An inexpensive, easy to build gas effusion apparatus for measuring molecular velocities is described. The instrument features a liquid nitrogen cooled adsorption pump to replace more costly diffusion and rotary vacuum pumps. Low cost, low maintenance, and simplicity of operation render the experiment suitable for introductory physics students. A straightforward measurement consistently yields average velocities within 10% of the calculated values.

 

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