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ERIC Number: EJ940776
Record Type: Journal
Publication Date: 2011-Jun
Pages: 5
Abstractor: As Provided
Reference Count: 8
ISSN: ISSN-0021-9584
Kundt's Tube: An Acoustic Gas Analyzer
Aristov, Natasha; Habekost, Gehsa; Habekost, Achim
Journal of Chemical Education, v88 n6 p811-815 Jun 2011
A Kundt tube is normally used to measure the speed of sound in gases. Therefore, from known speeds of sound, a Kundt tube can be used to identify gases and their fractions in mixtures. In these experiments, the speed of sound is determined by measuring the frequency of a standing sound wave at a fixed tube length, temperature, and pressure. This resonant frequency is dependent only on the properties of the gas, namely, its heat capacity ratio (adiabatic index) and molar mass. We discuss the capabilities of a Kundt tube for use as an instructional device to identify gases on the basis of their acoustic spectra and to use these spectra to determine the fractions of components of a binary mixture or to study the kinetics of gas-generating or gas-depleting reactions. (Contains 1 table, 4 figures, and 4 notes.)
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