Problem Set 18 - Problem Set 18 Chemistry 1130 Ch 7 pp 299-308 Kinetic-molecular theory gas laws distribution of molecular velocities diffusion and

Problem Set 18 - Problem Set 18 Chemistry 1130 Ch 7 pp...

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Problem Set 18 Chemistry 1130 Ch. 7, pp. 299-308 _______________________________________________________________________________________________________ Dr. S - 1 - P-Set18-F11-kinetic I.docx Kinetic-molecular theory: gas laws, distribution of molecular velocities, diffusion and effusion Important Equations: ! " 2 1 3 2 2 # # k E m speed RT 1. What is meant by an "ideal gas?" 2. State the postulates that define the kinetic-molecular theory. 3. Sketch both a velocity and kinetic-energy distribution curve for CH4at 300 K and at 600 K. Identify the rms velocities and label the axes. 4. Draw a kinetic energy distribution curve for CH 4 molecules and for N 2 molecules. Consider both samples of gas to be at the same temperature. Draw a velocity curve for the two materials. 5. The mass of a nitrogen molecule is approximately 14 times the mass of a hydrogen molecule. Compare the average velocity (speed) of nitrogen and hydrogen molecules at the same temperature. (Obtain a ratio of speeds.)

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