Effusion is the movement of a gas through extremely small opening of molecular size into region of _ pressure.
Correct answer: B. Low
- A. High
- B. Low
- C. Moderate
- D. Same
Explanation
Effusion is the movement of a gas through a small opening, such as a pinhole, into a region of lower pressure. This is because the gas molecules are more likely to collide with the walls of the container and be forced through the opening if the pressure is lower.The rate of effusion is inversely proportional to the square root of the molar mass of the gas. This means that lighter gases effuse faster than heavier gases. For example, hydrogen gas effuses much faster than oxygen gas.The rate of effusion is also proportional to the temperature of the gas. This means that gases effuse faster at higher temperatures.
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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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