a) Calculate the hydrogen concentration at low pressure (C HB) side in wt%.

b) Calculate the hydrogen concentration at high pressure (C HA) side in wt%.

c) Calculate the volume of iron at low pressure side (C HB).

d) Calculate the concentration gradient

e) Calculate the diffusion coefficient

f) Calculate the diffusion flux for steady state diffusion

When a-iron is subjected to an atmosphere of hydrogen gas, the concentration of hydrogen in the iron, CH (in weight percent), is a function of hydrogen pressure, Ph, (in MPa), and absolute temperature (T) according to Ch = 1.34 x 10-2 PH, exp( 27.2 kJ/mol , . RT Furthermore, the values of Do and Qd for this diffusion system are 2.6 x 10-7 m2/s and 11 kJ/mol, respectively. Consider a thin iron membrane 2.7-mm thick that is at 268C. Calculate the diffusion flux [in kg/(m2-s)] through this membrane if the hydrogen pressure on one side of the membrane is 0.12 MPa, and on the other side 6.7 MPa, given that the density of iron is 7.87 g/cm3