The average kinetic energy of the molecules in a gas sample depends only on the temperature, T. However, given the same kinetic energies, a lighter molecule will move faster than a heavier molecule, as shown in the equation for rms speed 3RT M rms speed = where R = 8.314 J/(mol-K) and M is molar mass in kilograms per mole. Note that a joule is the same as a kilogram-meter squared per second squared (kg-m²/s?). What is the rms speed of Cl, molecules at 371 K? rms speed: m/s What is the rms speed of He atoms at 371 K? rms speed: m/s

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The average kinetic energy of the molecules in a gas sample depends only on the temperature, T. However, given the same
kinetic energies, a lighter molecule will move faster than a heavier molecule, as shown in the equation for rms speed
3RT
rms speed =
where R = 8.314 J/(mol·K) and M is molar mass in kilograms per mole. Note that a joule is the same as a kilogram-meter
squared per second squared (kg-m²/s²).
What is the rms speed of Cl, molecules at 371 K?
rms speed:
m/s
What is the rms speed of He atoms at 371 K?
rms speed:
m/s
Transcribed Image Text:The average kinetic energy of the molecules in a gas sample depends only on the temperature, T. However, given the same kinetic energies, a lighter molecule will move faster than a heavier molecule, as shown in the equation for rms speed 3RT rms speed = where R = 8.314 J/(mol·K) and M is molar mass in kilograms per mole. Note that a joule is the same as a kilogram-meter squared per second squared (kg-m²/s²). What is the rms speed of Cl, molecules at 371 K? rms speed: m/s What is the rms speed of He atoms at 371 K? rms speed: m/s
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