Question
In a diatomic gas at ordinary temperatures, how many
degrees of freedom contribute to internal energy?Solution
In thermodynamics, the degrees of freedom of a gas molecule are the independent ways it can store energy. For a diatomic gas (e.g., Oâ‚‚, Nâ‚‚) at ordinary temperatures:
- 3 translational degrees of freedom (motion along x, y, z axes)
- 2 rotational degrees of freedom (about two perpendicular axes perpendicular to the bond axis)
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