A thin plastic membrane is used to separate helium from a gas stream. Under steadystate conditions the concentration of helium in the membrane is known to be 0.02 and 0.005 kg mol/m3 at the inner and outer surfaces, respectively. If the membrane is 1 mm thick and the binary diffusion coefficient of helium with respect to the plastic is 10–9 m2/s, what is the mass flux by diffusion?

A thin plastic membrane is used to separate helium from a gas stream. Under steadystate conditions the concentration of helium in the membrane is known to be 0.02 and 0.005 kg mol/m 3 at the inner and...

A thin plastic membrane is used to separate helium from a gas stream. Under steadystate conditions the concentration of helium in the membrane is known to be 0.02 and 0.005 kg mol/m³
at the inner and outer surfaces, respectively. If the membrane is 1 mm thick and the binary diffusion coefficient of helium with respect to the plastic is 10^–9
m²/s, what is the mass flux by diffusion?

Nov 25, 2021

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A thin plastic membrane is used to separate helium from a gas stream. Under steadystate conditions the concentration of helium in the membrane is known to be 0.02 and 0.005 kg mol/m 3 at the inner and...

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