The average kinetic energy of the molecules of any ideal gas depends only on
Correct answer: B. the absolute temperature
- A. the identity of the gas
- B. the absolute temperature
- C. the pressure
- D. the volume of the container
Explanation
At the same temperature, hydrogen and oxygen molecules have the same average kinetic energy, though the lighter hydrogen molecules must move much faster to achieve it. This is the microscopic meaning of temperature. It also explains Graham's law, since equal energy with unequal mass means unequal speed.
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About Kinetic Molecular Theory
Kinetic molecular theory explains gases as rapidly moving particles separated by large distances, with negligible volume and negligible intermolecular attraction in the ideal model. It relates temperature to average kinetic energy and explains gas pressure, Boyle's and Charles's laws, diffusion, effusion and the conditions under which real gases deviate from ideal behavior.
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