What is the relative rate of effusion of CO and CO2 ?
Correct answer: A. CO is 1.25 times faster than CO2
- A. CO is 1.25 times faster than CO2
- B. CO is 3.75 times faster than CO2
- C. CO is 1.25 times faster than CO
- D. Both diffuse at the same rate
Explanation
By Graham's law, rate of effusion is inversely proportional to the square root of molar mass: rate of CO/rate of CO2 = square root of 44 g/mol divided by 28 g/mol = square root of 1.571 = 1.25. Thus CO effuses 1.25 times faster than CO2. The likely mistake is choosing d by ignoring the difference in molar masses.
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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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