The formula of diffusion coefficient J = -D dφ/dx -Δφ is the driving force for a one-dimensional quantity of dimensional, and it is the concentration gradient for the ideal mixture.
How do you calculate diffusion?
Diffusion Rate Formula
To calculate a diffusion rate of a particular gas, divide the diffusion rate of the initial gas by the square root of the molar mass of gas 2 divide the molar mass of gas 1.