Question

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*10⁻¹²

b.

9.87*10⁻¹³

c.

9.87*10⁻¹¹

d.

9.87*10⁻¹⁰

Posted under Mass Transfer

Answer: (a).9.87*10⁻¹²

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Q. 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...

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