In an oxygen-nitrogen gas mixture at 1 atm., 25°C, the concentrations of oxygen at two planes 0.2 cm apart are 10% and 20% volume respectively. Calculate the rate of diffusion of oxygen expressed as g mol/em?s for the case where (i) the nitrogen is non-diffusing. (i) there is equimolar counter diffusion of the two gases. Diffusivity of oxygen in nitrogen at 25°C and 1 atm. is 0.206 cm³/s.

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Convective Mass Transfer between Phases

Mass transfer means the transport or movement of mass using streams, phases, components, and so on from one location to another.