Branca, Mario and Soletta, Isabella (2007) Cp/CvRatios measured by the sound velocity method using calculator-based laboratory technology. Journal of Chemical Education, Vol. 84 (3), p. 462-464. ISSN 0021-9584. Article.
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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.
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