The processes of effusion and diffusion are best understand by________________?
Correct answer: C. Grahams law
- A. Daltons law
- B. Avogadros law
- C. Grahams law
- D. Charles law
Explanation
Graham's law explains both diffusion and effusion by relating rate to molar mass: rate is proportional to 1 divided by the square root of molar mass. Dalton's, Avogadro's and Charles's laws describe other gas relationships. Students may choose Avogadro's law because it also concerns gases, but it relates volume to amount at constant temperature and pressure.
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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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