Calculate the effusion rate of N2 gas to Cl2 gas?

Answer 1

Graham's Law of Effusion:

rate of gas 1 / rate of gas 2 = sqrt MW gas 2/ sqrt MW gas 1

the rate of effusion is inversely proportional to the square root of the molar mass, so the heavier a gas is, the slower it will effuse.

molar mass N₂ = 28

molar mass Cl₂ = 71

sqrt 28 = 5.29

sqrt 71 = 8.43

ratio of N2 to Cl2 = 5.29/8.43 = 0.628

What this means is that N₂ will effuse about 1.6x faster than will Cl₂