MCQOPTIONS
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MCQOPTIONS
| 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> | |