CS考试辅导 Consider the diffusion of hydrogen (species A) in air, liquid water, or i

Consider the diffusion of hydrogen (species A) in air, liquid water, or iron (species B)
at T = 293 K. Calculate the species flux on both molar and mass bases if the concentration gradient at a particular location is dCA/dx = 1 kmol/m3 ⋅ m. Compare the value
of the mass diffusivity to the thermal diffusivity. The mole fraction of the hydrogen,
xA, is much less than unity.

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