Why is the average velocity of the particles greater in 1 mole of hydrogen gas at 25 (1 Viewer)

bubb

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Why is the average velocity of the particles greater in 1 mole of hydrogen gas at 25 degrees C then 1 mole of water vapour at 25 degrees C?
 

InteGrand

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Re: Why is the average velocity of the particles greater in 1 mole of hydrogen gas at

Why is the average velocity of the particles greater in 1 mole of hydrogen gas at 25 degrees C then 1 mole of water vapour at 25 degrees C?
Basically because hydrogen has a lower molar mass than water (H2O). If you want a detailed explanation, check up the Maxwell-Boltzmann distribution, which is the probability distribution used to describe particle velocities; you will see from the equations that a larger molar mass leads to a lower mean and mode velocity.

http://en.wikipedia.org/wiki/Maxwell–Boltzmann_distribution#Distribution_function
 
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QZP

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Re: Why is the average velocity of the particles greater in 1 mole of hydrogen gas at

Temperature correlates to the average kinetic energy (KE) of the particles.
KE = 1/2 mv^2 (from physics)
If m (mass) is lower, v (velocity) is higher for some temperature i.e. fixed KE
 

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