Physics

Problem

The specific heats,

C_p

and

C_v

of a gas of diatomic molecules, A, are given (in units of

\text{J mol}^{-1} \text{ K}^{-1}

) by 29 and 22, respectively. Another gas of diatomic molecules, B, has the corresponding values 30 and 21. If they are treated as ideal gases, then: a. A is rigid but B has a vibrational mode. b. A has a vibrational mode but B has none. c. A has one vibrational mode and B has two. d. Both A and B have a vibrational mode each.

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