Two cotton plugs soaked in HCI and NH3 solutions are introduced in the open ends of a glass tube, 1 cm long. Which gas travels fast?
Correct answer: B. NH3
- A. HCl
- B. NH3
- C. Equally
- D. Both
Explanation
The gas that travels faster will depend on the conditions of the experiment. However, generally speaking, ammonia (NH3) has a lower molecular weight than hydrogen chloride (HCl), which means that it moves faster on average at the same temperature and pressure. Hence only option B is correct.
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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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