Recall that Graham's Law of Effusion allows us to compare the rate of effusion of two gases. Graham's Law states that the rate of effusion of a gas is inversely proportional to its molar mass.
This means that when comparing two gases:
Since time is given:
Let's designate He as gas 1 and H2 as gas 2. Recall that rate = volume/time. This means:
Since the volume of He = volume of H2, the equation simplifies to:
Plugging this into Graham’s Law:
A balloon filled with helium gas is found to take 6 hours to deflate to 50% of its original volume. How long will it take for an identical balloon filled with the same volume of hydrogen gas (instead of helium) to decrease its volume by 50%?
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