For a diatomic gas, if γ 1 = ( C v Cp ) for rigid molecules and γ 2 = ( C v Cp ) for another diatomic molecules, but also having vibrational modes. Then, which one of the following options is

Question

For a diatomic gas, if γ 1 ​ = ( C v Cp ​ ) for rigid molecules and γ 2 ​ = ( C v Cp ​ ) for another diatomic molecules, but also having vibrational modes. Then, which one of the following options is correct ? (Cp and Cv are specific heats of the gas at constant pressure and volume)

TestHub · Accepted Answer

For rigid diatomic molecules ∴ ​ f = 5 γ 1 ​ = 5 7 ​ = 1.4 ​ For non-rigid diatomic molecules ∴ ​ f = 5 + 2 = 7 γ 2 ​ = 7 9 ​ = 1.28 γ 1 ​ > γ 2 ​ ​

Physics - Heat & Thermo Question with Solution | TestHub

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