The average kinetic energy of the molecules in a gas sample, Ask an Expert

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The average kinetic energy of the molecules in a gas sample depends only on the temperature, T. But given the same kinetic energies, a lighter molecule will move faster than a heavier molecule.

where R=8.314 J/(mol·K) and ? is molar mass in kilograms per mole. Note that a joule is the same as a kg·m2/s2.

What is the rms speed of Cl2 molecules at 337 K?

What is the rms speed of He atoms at 337 K?

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Category:- Chemistry
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