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ERIC Number: EJ921291
Record Type: Journal
Publication Date: 2010-Dec
Pages: 2
Abstractor: As Provided
Reference Count: 6
ISSN: ISSN-0021-9584
Substituting an Inexpensive Function Generator for the Pulsed Laser in the Experiment "Laser Measurement of the Speed of Sound in Gases"
Epstein, Mark G.; Laszlo, Matthew W.; Mayer, Steven G.
Journal of Chemical Education, v87 n12 p1414-1415 Dec 2010
We present an adaptation to an experiment previously published in this "Journal". The experiment was designed to determine the heat capacity ratios of gases by measuring the speed of sound using a modified Kundt's tube. The experiment yielded excellent results for all of the gases and gas mixtures measured. Although elegant in its simplicity, it made use of an expensive pulsed laser that is not a common piece of equipment at most liberal arts institutions. By replacing the laser with an inexpensive function generator and speaker, we found that our results were of comparable accuracy and precision. (Contains 2 tables.)
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:; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A