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How does the root mean square speed of a gas vary with molar mass?

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Wize University Chemistry Textbook > Gases and their Properties

Kinetic Energy, Temperature, and Speed of Gas Particles

6 Activities

How does the root mean square speed of a gas vary with molar mass?
More Kinetic Energy, Temperature, and Speed of Gas Particles Questions:
Molecular Theory of Gases: Kinetic Energy
Which of the following have the same kinetic energy?
He at 297 K He at 351 K H2 at 297 K O2 at 212 K SO2 at 297 K
Collision theory: Root Mean Square Speed
Which of the following would have the lowest root mean square speed?
a) NO2 at 273 K b) NO2 at 453 K c) O2 at 273 K
Consider the following two curves showing distributions of number of molecules vs. their kinetic energies for two different gas samples. Which of the following statements is not consistent with the two curves?
If the temperature of a sample of an unknown gas is increased from 0 °C to 100 °C, what will be the new root mean square speed of the particles if the original value was 330 m/s?
If a mixture of He and Xe are present in a vessel, and the root mean square speed of He is 412 m/s, what is the root mean square speed of Xe? What is the temperature of this vessel?
Gas Laws
Choose the correct statement(s):
Kinetic Molecular Theory
1. Compare the average kinetic energies of SiH4 and CH4 at a specific temperature?
2. Place these gases in order of increasing average molecular speed at 25 °C: Kr, CH4, N2, CH2Cl2.
Kinetic Molecular Theory
Calculate the ratio of the rms speed of N2 molecules 100 ⁰C to the rms speed of the same at 0 ⁰C.
Graham's Law: Kinetic Energy
1. If a mixture of He and Xe are present in a vessel, and the root mean square speed of He is 412 m/s, what is the root mean square speed of Xe? What is the temperature of this vessel?
Kinetic Energy and Temperature
3. If the temperature of a sample of an unknown gas is increased from 0 °C to 100 °C, what will be the new root mean square speed of the particles if the original value was 330 m/s?
Which of the following have the same kinetic energy?
I He at 297 K
II He at 351 K
Collision theory: Root Mean Square Speed
Which of the following would have the lowest rms?
a) NO2 at 273 K b) NO2 at 453 K c) O2 at 273 K
Molecular Theory of Gases: Kinetic Energy
Which of the following have the same kinetic energy?
He at 297 K He at 351 K H2 at 297 K O2 at 212 K SO2 at 297 K
Molecular theory of gases: Kinetic energy
Which one of the following gases has the greatest average molecular velocity at 300 K?
Atom: Wave-Particle
An proton is confined in a 1-D box with a length of 40 pm.
What is the wavelength of the proton when n = 3?
Atom: Kinetic Energy
An proton is confined in a 1-D box with a length of 40 pm.
What is the kinetic energy of the proton when n = 3?
Atom: Kinetic Energy
A proton is confined in a 1-D box with a length of 40 pm.
Would moving to a larger box result in higher or lower energy?
Kinetic Molecular Theory
Suppose you have a sample of gas at a fixed temperature, and you increase the volume of the container. The pressure changes, since there are...
Gas Laws
Suppose you have a sample of gas at a fixed temperature, and you increase the volume of the container. The pressure changes, since there are...
Kinetic Molecular Theory
Which statement is false?
Consider the following two curves showing distributions of number of molecules vs. their kinetic energies for two different gas samples. Which of the following statements is not consistent with the two curves?
The following curves show the distribution of molecules vs. speed for two different samples of gas, System 1 and System 2. The area under both curves is equal. Which of these descriptions is not consistent with the differences between these two graphs?