A sphere of radius Ro is brought into contact with a copious amount of air. Assume that the material in the sphere is soluble in air, that the rate of dissolution of the solid is controlled by diffusion of the solute in a stagnant film, and that the density of the solute at the surface of the sphere is pAo. Determine the mass concentration profile of the solute along the stagnant film, as well as the mass diffusive flux, considering each of the following cases: A) The stagnant film has a thickness R1 and the mass concentration outside the film is pA1 B) What is a free diffusion process.
A sphere of radius Ro is brought into contact with a copious amount of air. Assume that the material in the sphere is soluble in air, that the rate of dissolution of the solid is controlled by diffusion of the solute in a stagnant film, and that the density of the solute at the surface of the sphere is pAo. Determine the mass concentration profile of the solute along the stagnant film, as well as the mass diffusive flux, considering each of the following cases: A) The stagnant film has a thickness R1 and the mass concentration outside the film is pA1 B) What is a free diffusion process.
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:A sphere of radius Ro is brought into contact with a copious amount of air. Assume that the material in
the sphere is soluble in air, that the rate of dissolution of the solid is controlled by diffusion of the solute
in a stagnant film, and that the density of the solute at the surface of the sphere is pAo. Determine the
mass concentration profile of the solute along the stagnant film, as well as the mass diffusive flux,
considering each of the following cases:
A) The stagnant film has a thickness R1 and the mass concentration outside the film is pA1
B) What is a free diffusion process.
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