Which of the following gases has the lowest rms velocity at 25°C?
Correct answer: D. Cl2
- A. SO2
- B. N2
- C. O2
- D. Cl2
Explanation
The rms velocity is inversaly proportional to square root of molecular mass.So,the gas with highest molecular mass will have lowest rms velocity.Since Cl2 has highest molecular mass (71 g/mol). So,it will have lowest rms velocity.
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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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