A classical model of a diatomic molecule is a springy dumbbell, as shown, where the dumbbell is free to rotate about axes perpendicular to the spring. At high temperature when the vibrational degree o

Question

A classical model of a diatomic molecule is a springy dumbbell, as shown, where the dumbbell is free to rotate about axes perpendicular to the spring. At high temperature when the vibrational degree of freedom is excited, the specific heat per mole at constant volume is

Options:

Answer:

C

Solution:

3 translational + 2 rotational + 2 vibrational $(KE + PE) = 7$ degrees of freedom:

$C_{V} = \frac{f}{2} R = \frac{7}{2} R .$

TestHub · Accepted Answer

3 translational + 2 rotational + 2 vibrational ( KE + PE ) = 7 degrees of freedom: C V ​ = 2 f ​ R = 2 7 ​ R .

Physics - Heat & Thermo Question with Solution | TestHub

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