Athin sheet of iron 0.5 mm thick has a nitrogen concentration on one side of 0.5 kg/m^3 and a nitrogen concentration on the other side of 3.5kg/m^3 . the diffusion coefficient is 3.44x10^-15 m^2/s. what is the flux of nitrogen through the iron?

2.064× 10⁻¹¹ kg/m²s

Explanation:

The expression for the Fick's first law is shown below as:

Where, J is the diffusion flux.

D is the diffusion coefficient =

dC is the concentration change ( 3.5 - 0.5 kg/m³ = 3 kg/m³)

dx is the thickness = 0.5 mm = 0.0005 (As , 1 mm = 0.001 m )

Thus,

Magnitude of the flux = 2.064× 10⁻¹¹ kg/m²s

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