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24 flux and partial pressure gradient in diffusion of a...

Question: 24 flux and partial pressure gradient in diffusion of a...

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2.4 (Flux and partial pressure gradient in diffusion of A through non-diffusing B) Ammonia is being absorbed from an ammonia(A)-air(B) mixture in sulphuric acid. The concentration of ammonia in the air 10 mm from the acid surface is 40% by volume and that at the acid surface is negligible. The total pressure in the system is 400 mm Hg and the temperature is 300 K. Calculate (a) the rate of absorption of ammonia across 0.1 m2 gas liquid contact area, (b) the partial pressure gradient of ammonia at 4 mm from the acid surface, and (c) the rate of mass transfer of ammonia by molecular transport and that by bulk flow at the two ends of the film.

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