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Q. No.In a diatomic molecule, the rotational energy at a given temperature:
Choose the correct alternatives:
| (a) | obeys Maxwell’s distribution. |
| (b) | have the same value for all molecules. |
| (c) | equals the translational kinetic energy for each molecule. |
| (d) | is \(\frac{2}{3}\text{rd}\) the translational kinetic energy for each molecule. |
| 1. | (a), (b) | 2. | (a), (d) |
| 3. | (c), (d) | 4. | (a), (c) |
Subtopic: Law of Equipartition of Energy |
57%
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Diatomic molecules like hydrogen have energies due to both translational as well as rotational motion. The equation in kinetic theory \(p V=\frac{2}{3} E \text {, }\) \(E\) is:
| 1. | the total energy per unit volume. |
| 2. | only the translational part of energy because rotational energy is very small compared to translational energy. |
| 3. | only the translational part of the energy because during collisions with the wall pressure relates to the change in linear momentum. |
| 4. | the translational part of the energy because rotational energies of molecules can be of either sign and its average over all the molecules is zero |
Subtopic: Law of Equipartition of Energy |
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