A sheet of Fe 1.0 mm thick is exposed to an oxidizing gas on one side – McqOptions

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1.	A sheet of Fe 1.0 mm thick is exposed to an oxidizing gas on one side and a deoxidizing gas on the other at 725 C. After reaching steady state, the Fe membrane is exposed to room temperature, and the C concentrations at each side of the membrane are 0.012 and 0.075 wt%. Calculate the diffusion coefficient (m²/sec) if the diffusion flux is 1.4 10^-8kg/m²-sec.
A.	9.87*10<sup>-12</sup>
B.	9.87*10<sup>-13</sup>
C.	9.87*10<sup>-11</sup>
D.	9.87*10<sup>-10</sup>
Answer» B. 9.87*10<sup>-13</sup>

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