A sheet of steel 1.5mm thick has nitrogen atmospheres on both sides and is permitted to achieve a steady-state diffusion condition. The diffusion coefficient for nitrogen in steel a is 6.05E- 11 m2/s, and the diffusion flux is found to be 1.5E-7kg/m2 s. Also, it is known that the concentration of nitrogen in the steel at the high concentration is 4.97 kg/m3 while the lower concentration is 2.5 kg/m3 . How far XA (mm) will be from the sheet to reach the lower concentration?

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