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When a-iron is subjected to an atmosphere of hydrogen gas, the concentration of hydrogen in the iron, C₁, (in weight percent), is a function of hydrogen pressure. /, (in MPa), and absolute temperature (7) according to 272 ml Cu = 1.34 x 103/P exp(- KI Furthermore, the values of Do and Q, for this diffusion system are 4.8 x 107 m²/s and 11 kJ/mol, respectively. Consider a thin ironi membrane 2.7-mm thick that is at 227°C. Calculate the diffusion flux [in kg/(m²-s)) through this membrane if the hydrogen pressure on one side of the membrane is 0.16 MPa, and on the other side 7.0 MPa, given that the density of iron is 7.87 g/cm³
(a) What is the concentration of hydrogen at the low-pressure (or B) side in wt%? CH(B) = i 9.99E-6 wt% (b) What is the concentration of hydrogen at the high-pressure (or A) side in wt%? CH(A) = i 7.79E-5 wt%