Work out diffusion rate (fick law) instantly with clear inputs, formula shown and shareable results.
Applies Fick's first law: flux is proportional to the diffusion coefficient, the exchange area and the concentration gradient across the barrier.
Fick's first law
J = D x A x (dC/dx), where dC is converted from mol/L to mol/cm3 by dividing by 1000
Flux is inversely proportional to distance, which is why gas exchange surfaces are only one or two cells thick.
Higher temperature and lower molecular size or medium viscosity all increase it.