MHT CET 2023 Physics question
Let be the ratio of molar specific heat at constant pressure and molar specific heat at constant volume of a monoatomic gas and be the similar ratio of diatomic gas. Considering the diatomic gas molecule as a rigid rotator, the ratio is
Answer: (C)
Solution
Monoatomic gas: 3 degrees of freedom, , , so . A rigid diatomic rotator has 3 translational + 2 rotational = 5 degrees of freedom (no vibration), , , so . Ratio:
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