In the article “Cp/CV Ratios Measured by the Sound Velocity Method Using Calculator-Based Laboratory Technology” (J. Chem. Educ. 2007, 84, 462–464), the last line of the second paragraph reads:For a linear, tri-atomic molecule, such as carbon dioxide, there are six degrees of freedom (three translational and three rotational) and, therefore, γ = 1 + (2/6) = 1.33.
Instead, it should read: For a linear, tri-atomic molecule, such as carbon dioxide, there are five degrees of freedom (three translational and two rotational) and, therefore, γ = 1 + (2/5) = 1.40.
Readers may view the emended PDF file.
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