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Fick’s second law is applicable to steady –state diffusion?

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Fick’s second law is applicable to steady –state diffusion?

(a) True

(b) False

This question was addressed to me in a national level competition.

This interesting question is from Role of Diffusion in Bioprocessing topic in division Mass Transfer of Bioprocess Engineering

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The correct choice is (b) False

For explanation: Non- steady state diffusion – Concentration of solute atoms at any point in metal changes with time in this case. And the Fick’s second law states that rate of compositional change is equal to diffusivity times the rate of change of concentration gradient.

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