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Ethanol vapor is being absorbed from a mixture of alcohol vapor and water vapor by means of a non-volatile solvent in which alcohol is soluble but water is not. The temperature is 97°C, and the total pressure is 760 mm Hg. The alcohol vapor can be considered diffusing through a film of alcohol-water vapor mixture 0.1 mm thick. The mol% of the alcohol in the vapor at the outside of the film is 80%, and that of the inside, next to the solvent, is 10%. The diffusivity of alcohol-water vapor mixtures at 25°C and 1 atm is 0.15 cm2/s. Calculate the rate of diffusion of alcohol vapor in kilograms per hour if the area of the film is 10m2.

Ethanol vapor is being absorbed from a mixture of alcohol vapor and water vapor by means of a non-volatile solvent in which alcohol is soluble but water is not. The temperature is 97°C, and the total pressure is 760 mm Hg. The alcohol vapor can be considered diffusing through a film of alcohol-water vapor mixture 0.1 mm thick. The mol% of the alcohol in the vapor at the outside of the film is 80%, and that of the inside, next to the solvent, is 10%. The diffusivity of alcohol-water vapor mixtures at 25°C and 1 atm is 0.15 cm2/s. Calculate the rate of diffusion of alcohol vapor in kilograms per hour if the area of the film is 10m2.

Introduction to Chemical Engineering Thermodynamics
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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Ethanol vapor is being absorbed from a mixture of alcohol vapor and water vapor by means of a non-volatile solvent in which alcohol is soluble but water is not. The temperature is 97°C, and the total pressure is 760 mm Hg. The alcohol vapor can be considered diffusing through a
film of alcohol-water vapor mixture 0.1 mm thick. The mol% of the alcohol in the vapor at the outside of the film is 80%, and that of the
inside, next to the solvent, is 10%. The diffusivity of alcohol-water vapor mixtures at 25°C and 1 atm is 0.15 cm2/s. Calculate the rate
of diffusion of alcohol vapor in kilograms per hour if the area of the film is 10m2.

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