Chemistry- Diffusion

Question

Calculate the ratio of the rates of diffusion of neon to chlorine at room temperature. Which gas diffuses faster? How much faster?

Answer 1

Ne = 20.18 g/mol

Cl2 = 70.9 g/mol

The lighter gas will diffuse faster, so that would be neon (Ne). To find out how much faster, we can use Graham's Law: rate gas 1/rate gas 2 = √MW gas 2/√MW gas 1

rate Ne/rate Cl2 = √70.9/√20.18 = 8.42/4.49 = 1.9 times as fast (almost twice as fast)