X ml of H2 gas effuses through a hole in a container in 5 seconds. The time taken for the effusion of the same volume of O2 gas under identical conditions is:
Correct answer: B. 20 seconds: O2
- A. 10 seconds: He
- B. 20 seconds: O2
- C. 25 seconds: CO
- D. 35 seconds: CO2
Explanation
The key to solve this question is the understanding GRAHAM's LAW OF DIFFUSION which states that: The rate of diffusion or effusion of a gas is inversely proportional to the square root of it's density at constant temperature and pressure. This is the following solution:
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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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