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Cp /Cv Ratios Measured by the Sound Velocity Method Using Calculator-Based Laboratory Technology
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Abstract
The velocity of sound in a gas depends on its temperature, molar mass, and λ = Cp / Cv, ratio (heat capacity at a constant pressure to heat capacity at constant volume). The λ values for air, oxygen, nitrogen, argon, and carbon dioxide were determined by measuring the velocity of the sound through the gases at room temperature. The sound velocity is measured with a microphone using Calculator-Based Laboratory (CBL) Technology.
Keywords (Audience):
First-Year Undergraduate / GeneralKeywords (Domain):
Physical ChemistryKeywords (Pedagogy):
Hands-On Learning / ManipulativesKeywords (Subject):
GasesCiting Articles
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This article has been cited by 1 ACS Journal articles (1 most recent appear below).
Laser Measurement of the Speed of Sound in Gases: A Novel Approach to Determining Heat Capacity Ratios and Gas Composition
J. Clayton Baum , R. N. Compton and Charles S. FeigerleJournal of Chemical Education2008 85 (11), 1565Laser Measurement of the Speed of Sound in Gases: A Novel Approach to Determining Heat Capacity Ratios and Gas Composition
J. Clayton Baum , R. N. Compton and Charles S. FeigerleJournal of Chemical Education2008 85 (11), 1565The speed of sound is measured in several gases using a pulsed laser to create a micro-spark on a carbon rod and a microphone connected to a digital oscilloscope to measure the time-of-flight of the resulting shockwave over a known distance. These data ...
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- Received: August 03, 2009
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