Heat and Thermodynamics 4 Question 23
25. A vessel contains a mixture of one mole of oxygen and two moles of nitrogen at . The ratio of the average rotational kinetic energy per molecule to per molecule is
(1998, 2M)
(a)
(b)
(c)
(d) depends on the moment of inertia of the two molecules
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Solution:
- Average kinetic energy per molecule per degree of freedom
. Since, both the gases are diatomic and at same temperature , both will have the same number of rotational degree of freedom i.e. two. Therefore, both the gases will have the same average rotational kinetic energy per molecule