Velocity Averages for Gas Particles
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This Demonstration shows four measures of the distribution of the velocities of particles with variable molar masses at different temperatures. The four parameters are the most probable velocity , in blue, the average velocity , in red, the root-mean-square velocity in yellow, and the standard deviation of the velocity , in green.
Contributed by: Shantanu Gore and Arun Kannan (June 2014)
Open content licensed under CC BY-NC-SA
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The Maxwell-Boltzmann distribution is given by:
, where is the particle mass, is the Boltzman constant, is the temperature of the system, and is the molecular velocity.
The formulas for computing the four velocities are:
, where is the ideal gas constant (), is the temperature in kelvin, and is the molar mass in kilograms,
,
,
.
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