Hydrogen gas is maintained at 3 bars and 1 bar on opposite sides of a plastic membrane, which is 0.3 mm thick. The temperature is 25°C, and the binary diffusion coefficient of hydrogen in the plastic is 8.7 x 10^-8 m2/s. The solubility of hydrogen in the membrane is 1.5 x 10^-3  kmol/m3•ar.  -What is the concentration (in kg/m3) of the gas on the 3-bar side of  the membrane?  -What is the concentration (in kg/m3) of the gas on the 1-bar side of the membrane?  - What is the mass diffusive flux of hydrogen (in kg/s.m2) through the membrane?  -What is the pressure (in bar) of the hydrogen gas halfway through the membrane?

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
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Hydrogen gas is maintained at 3 bars and 1 bar on opposite sides of a plastic membrane, which is 0.3 mm thick. The temperature is 25°C, and the binary diffusion coefficient of hydrogen in the plastic is 8.7 x 10^-8 m2/s. The solubility of hydrogen in the membrane is 1.5 x 10^-3  kmol/m3•ar. 

-What is the concentration (in kg/m3) of the gas on the 3-bar side of  the membrane? 
-What is the concentration (in kg/m3) of the gas on the 1-bar side of the membrane? 
- What is the mass diffusive flux of hydrogen (in kg/s.m2) through the membrane? 
-What is the pressure (in bar) of the hydrogen gas halfway through the membrane? 

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