Temperature and Particle Motion


Observe the movement of particles of an ideal gas at a variety of temperatures. A histogram showing the Maxwell-Boltzmann velocity distribution is shown, and the most probable velocity, mean velocity, and root mean square velocity can be calculated. Molecules of different gases can be compared.

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Assessment Questions (5):

  1. The graph below shows the velocity distribution for a gas at 400 K. Which of the following graphs correspond to the same gas at 800 K?

    Velocity distribution graph

    Four velocity distribution graphs.
  2. A high-temperature gas is compared to the same gas at lower temperature. Which of the following statements is true?
  3. What Celsius temperature is closest to 431 K?
  4. The graph below represents the velocity distribution of helium atoms at 800 K. The molar mass of helium gas is 0.004 kg/mole. The molar mass of nitrogen gas is 0.028 kg/mole. Which of the following graphs represents the velocity distribution of nitrogen molecules at 800 K?

    Helium velocity distribution graph

    Four velocity distribution graphs.
  5. The mean particle velocity for a certain gas at a certain temperature is 2,174 m/sec. From the choices below, what is the most likely value for the most probable particle velocity?

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