84. Calculate the root mean square velocity and kinetic energy of CO, CO2, and SO3 at 298 K. Which gas has the greatest velocity? The greatest kinetic energy? The greatest effusion rate?
84. Calculate the root mean square velocity and kinetic energy of CO, CO2, and SO3 at 298 K. Which gas has the greatest velocity? The greatest kinetic energy? The greatest effusion rate?
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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 | [Watch IWE 6.15](#)
#### Problem 86:
Calculate the ratio of effusion rates for Ar and Kr.
#### Problem 87:
A sample of neon effuses from a container in 76 seconds. The same amount of an unknown noble gas requires 155 seconds. Identify the second gas.
**Topic Reference:**
- MISSED THIS? [Read Section 6.9](#) | [Watch IWE 6.15](#)
#### Problem 88:
A sample of N₂O effuses from a container in 42 seconds. How long will it take the same amount of gaseous I₂ to effuse from the same container under identical conditions?
#### Problem 89:
The graph shows the distribution of molecular velocities for two different molecules (A and B) at the same temperature. Which molecule has the higher molar mass? Which molecule has the higher rate of effusion?
**Topic Reference:**
- MISSED THIS? [Read Section 6.8](#) | [Watch KCV 6.8](#)
[Insert Diagram Here: A graph illustrating the distribution of molecular velocities for two different molecules, A and B, at the same temperature. The x-axis represents the velocity, and the y-axis represents the number of molecules.]
In the graph:
- **Molecule A** has higher average velocities indicating it has a lower molar mass and hence a higher rate of effusion.
- **Molecule B** has lower average velocities indicating it has a higher molar mass and](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fd1f6c45b-6e75-4e5a-9a88-cb14ddcc340c%2F414949ce-fa76-417a-864b-83c0dd50eafa%2F5y1lj5_processed.jpeg&w=3840&q=75)
Transcribed Image Text:### Practice Problems on Effusion and Molecular Velocities
#### Problem 84:
Calculate the root mean square velocity and kinetic energy of CO, CO₂, and SO₃ at 298 K. Which gas has the greatest velocity? The greatest kinetic energy? The greatest effusion rate?
#### Problem 85:
We separate U-235 from U-238 by fluorinating a sample of uranium to form UF₆ (which is a gas) and then taking advantage of the different rates of effusion and diffusion for compounds containing the two isotopes. Calculate the ratio of effusion rates for ²³⁸UF₆ and ²³⁵UF₆. The atomic mass of U-235 is 235.054 amu and that of U-238 is 238.051 amu.
**Topic Reference:**
- MISSED THIS? [Read Section 6.9](#) | [Watch IWE 6.15](#)
#### Problem 86:
Calculate the ratio of effusion rates for Ar and Kr.
#### Problem 87:
A sample of neon effuses from a container in 76 seconds. The same amount of an unknown noble gas requires 155 seconds. Identify the second gas.
**Topic Reference:**
- MISSED THIS? [Read Section 6.9](#) | [Watch IWE 6.15](#)
#### Problem 88:
A sample of N₂O effuses from a container in 42 seconds. How long will it take the same amount of gaseous I₂ to effuse from the same container under identical conditions?
#### Problem 89:
The graph shows the distribution of molecular velocities for two different molecules (A and B) at the same temperature. Which molecule has the higher molar mass? Which molecule has the higher rate of effusion?
**Topic Reference:**
- MISSED THIS? [Read Section 6.8](#) | [Watch KCV 6.8](#)
[Insert Diagram Here: A graph illustrating the distribution of molecular velocities for two different molecules, A and B, at the same temperature. The x-axis represents the velocity, and the y-axis represents the number of molecules.]
In the graph:
- **Molecule A** has higher average velocities indicating it has a lower molar mass and hence a higher rate of effusion.
- **Molecule B** has lower average velocities indicating it has a higher molar mass and
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