At the same temperature, which of the following gases will effuse the slowest?
A) Hydrogen
B) Helium
C) Fluorine
D) Xenon
E) Bromine

Respuesta :

Xenons at the same temperature, will effuse the slowest

The effusion rates is said to be inversely proportional to the square root of the molecular masses of the gases.

  • Hydrogen, helium, fluorine, and bromine effuses out of container earlier than Xenon because they have lower mass when compared to Xenon.

At a set temperature, the average kinetic energy of all gaseous molecules is always equal.

Hydrogen gas has the lowest mass out of these gases, it will have the highest average velocity and as such, that it will exit out of the tiny hole at a rate faster than the other gases.

  • As the mass increases, the rate of effusion decreases. The gas with the lowest molecular weight will effuse the fastest.

Conclusively, The rate of effusion for a gas is inversely proportional to the square-root of its molecular mass, this is Graham's Law.

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