Rate of Diffusion at a Certain Temperature

Question

Arrange the following gases in order of increasing rate of diffusion at room temperature:CF3Cl ; CF4 ; CCl4 ; CF2Cl2

Answer 1

With all other variables constant, the rate of diffusion will depend on the molecular weight.

CF₃Cl - 104.46 amu

CF_{4 -} 88 amu

CCl_{4 -} 153.8 amu

CF₂Cl₂ - 120.91 amu

Given this information, the gases arranged in increasing rate of diffusions are: CF4, CF3Cl, CF2Cl2, and CCl4.