MHT CET 2024 Physics question
The average translational kinetic energy of nitrogen (molar mass 28) molecules at a particular temperature is 0.042 eV. The translational kinetic energy of oxygen molecules (molar mass 32) in eV at double the temperature is
Answer: (D)
Solution
The average translational kinetic energy of a gas molecule is , which depends only on the absolute temperature and not on the mass or the nature of the gas. So the molar masses (28 and 32) are irrelevant. For oxygen at double the temperature, $' =
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