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 molem? s for the case where (i) the nitrogen is non-diffusing. (ii) 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.

Introduction to Chemical Engineering Thermodynamics
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Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
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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/cm? s for the case
where
(i) the nitrogen is non-diffusing.
(ii) there is equimolar counter diffusion of the two gases.
Diffusivity of oxygen in nitrogen at 25°C and 1 atm. is 0.206 cm/s.
Transcribed Image Text: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/cm? s for the case where (i) the nitrogen is non-diffusing. (ii) there is equimolar counter diffusion of the two gases. Diffusivity of oxygen in nitrogen at 25°C and 1 atm. is 0.206 cm/s.
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