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ERIC Number: EJ921277
Record Type: Journal
Publication Date: 2010-Dec
Pages: 2
Abstractor: As Provided
Reference Count: 3
ISBN: N/A
ISSN: ISSN-0021-9584
Determining Atmospheric Pressure with a Eudiometer and Glycerol
Brody, Jed; Rohald, Kate; Sutton, Atasha
Journal of Chemical Education, v87 n12 p1367-1368 Dec 2010
We consider a volume of air trapped over a glycerol column in a eudiometer. We demonstrate that there is an approximately linear relationship between the volume of trapped air and the height of the glycerol column. Simply by moving the eudiometer up and down, we cause the glycerol-column height and trapped-air volume to vary. The plot of volume versus height has a slope that depends on atmospheric pressure. We show how to determine atmospheric pressure from the plot of trapped-air volume versus glycerol-column height. This exercise allows students to use a familiar instrument in an unfamiliar way, while improving their understanding of pressure measurements and Boyle's law. (Contains 2 figures.)
Division of Chemical Education, Inc and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: eic@jce.acs.org; Web site: http://pubs.acs.org/jchemeduc
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A