CO2 is diffusing through N2 at atmospheric pressure and 25C. The mole fraction of CO2 at point A is 0.2 and is 0.02 at a point B which is 3m away from A in the direction of diffusion. Diffusivity is 0.144 cm2/s. The gas phase as a whole (N2 + CO2) is stationary. Considering this system, answer the following – (a) write down the equation for the total molar flux of CO2 and sketch the expected molar concentration profile; (b) calculate the total molar flux of CO2 in SI units; (c) calculate the net mass flux in Kg/m2.h;
CO2 is diffusing through N2 at atmospheric pressure and 25C. The mole
fraction of CO2 at point A is 0.2 and is 0.02 at a point B which is 3m away from A in the
direction of diffusion. Diffusivity is 0.144 cm2/s. The gas phase as a whole (N2 + CO2) is
stationary. Considering this system, answer the following – (a) write down the equation
for the total molar flux of CO2 and sketch the expected molar concentration profile; (b)
calculate the total molar flux of CO2 in SI units; (c) calculate the net mass flux in Kg/m2.h;
(d) calculate the velocity of a moving reference plane such that the net mass flux is zero
relative to this plane.
As per our guidelines, we are supposed to answer only three subparts, please send the other part as a separate question
Solution :
Given that
CO2 is diffusing through N2 at atmospheric pressure and 25oC.
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