Question

Q. 18) Please answer to the following question and briefly explain the reason: i) Briefly explain the concept of steady state and non-steady state as it applies to diffusion. ii) Briefly explain how you can distinguish between steady state and non-steady state diffusion.

Answer 1

Solution ::

Answer 1

The basic concept of steady state and non steady state when it applies to diffusion is The “driving force” for many types of diffusion is the existence of a concentration gradient , steady state diffusion flux is independent of time whereas non steady state diffusion varies as per concentration gradient with time.

5.6) Steady state. Diffiniton I Fick's First Law, D de where du .de da concentration gradient, D = Diffusion coefficient. I= Diffusion flux . that time. It is assumed in the above law dc is independent of da Hence the diffusion tux in unaffected by time at it steady state. called So

Answer 2

The main difference between steady state diffusion and non steady state diffusion is that steady state diffusion takes place at a constant rate whereas the rate of non steady state diffusion is a function of time.

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