Ammonia (A) diffuses through a stagnant layer of air (B), 2 cm thick, at 25 °C and 1 atm total pressures. The partial pressures of NH3 on the two sides of the air layer are pao = 0.8 atm and pAI = 0.2 atm respectively. Air is non-diffusing. %3D %3D Calculate (a) the molar flux of NH3, (b) the velocities of the individual components with respect to a stationary observer, (c) the molar and the mass average velocities of the components, and (d) the molar flux of NH3 with respect to an observer moving with the mass average velocity. (e) Also prepare the plots of partial pressure distributions of ammonia and air along the diffusion path. Given: DAB = 0.214 cm²/s. %3D
Ammonia (A) diffuses through a stagnant layer of air (B), 2 cm thick, at 25 °C and 1 atm total pressures. The partial pressures of NH3 on the two sides of the air layer are pao = 0.8 atm and pAI = 0.2 atm respectively. Air is non-diffusing. %3D %3D Calculate (a) the molar flux of NH3, (b) the velocities of the individual components with respect to a stationary observer, (c) the molar and the mass average velocities of the components, and (d) the molar flux of NH3 with respect to an observer moving with the mass average velocity. (e) Also prepare the plots of partial pressure distributions of ammonia and air along the diffusion path. Given: DAB = 0.214 cm²/s. %3D
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:Ammonia (A) diffuses through a stagnant layer of air (B), 2 cm thick, at 25 °C
and 1 atm total pressures. The partial pressures of NH3 on the two sides of the
air layer are pao = 0.8 atm and pai = 0.2 atm respectively. Air is non-diffusing.
Calculate (a) the molar flux of NH3, (b) the velocities of the individual
components with respect to a stationary observer, (c) the molar and the mass
average velocities of the components, and (d) the molar flux of NH3 with respect
to an observer moving with the mass average velocity. (e) Also prepare the plots
of partial pressure distributions of ammonia and air along the diffusion path.
Given: DAB = 0.214 cm²/s.
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