Chemistry Hw help If a molecule of CH4 diffuses a speed of 340 m/s from a point source, calculate the speed that a molecule of N2 would diffuse under the same conditions for the same period of time.

Question

If a molecule of CH4 diffuses a speed of 340 m/s from a point source, calculate the speed that a molecule of N2 would diffuse under the same conditions for the same period of time.

Answer 1

Graham's Law of Effusion/Diffusion:

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

rate CH₄/rate N₂ = sqrt MW N₂ / sqrt MW CH₄

340 / x = √ 28/16

340 / x = 1.32

x = 258 m/s = speed of diffusion of N₂