Consider the following statements: For diatom | vedclass

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(D) For diatomic gases,the degrees of freedom $(f)$ change with temperature due to the activation of vibrational modes.At lower temperatures,only tran

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$1$ and $3$

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(D) For diatomic gases,the degrees of freedom $(f)$ change with temperature due to the activation of vibrational modes.At lower temperatures,only translational and rotational degrees of freedom are active $(f = 5)$,so $\gamma = C_p/C_v = 1 + (2/f) = 1 + (2/5) = 1.40$.At higher temperatures,vibrational modes also become active,increasing the degrees of freedom $(f = 7)$,so $\gamma = 1 + (2/7) \approx 1.29$.The value $1.66$ corresponds to monoatomic gases.Therefore,statements $1$ and $3$ are correct.

Consider the following statements: For diatomic gases,the ratio $C_p/C_v$ is equal to:
$1$. $1.40$ (lower temperature)
$2$. $1.66$ (moderate temperature)
$3$. $1.29$ (higher temperature)
Which of the above statements are correct?

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Consider the following statements: For diatomic gases,the ratio $C_p/C_v$ is equal to:$1$. $1.40$ (lower temperature)$2$. $1.66$ (moderate temperature)$3$. $1.29$ (higher temperature)Which of the above statements are correct?