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The Fick's Law of Molecular Diffusion states that the mole of substance A being transferred per time (A) per unit area (A) is proportional to the negative of the differential of the concentration (dC,) but inversely proportional to the differential of the distance, z, by which there is the diffusion occurs (dz). The proportionality constant being the volumetric diffusivity D. In mathematics, dCA NA -D, A NA/A is called the molar flux and is constant throughout any distance. Considering a perfect gas at 25°C, with initial pressure of 0.8 atm diffusing through one (1) meter distance, by which the exit pressure is 0.2 atm; it has a diffusivity of 0.121 cm²/s at 25°C. Calculate the molar flux of dz the gas in mole/s-m².

The Fick's Law of Molecular Diffusion states that the mole of substance A being transferred per time (A) per unit area (A) is proportional to the negative of the differential of the concentration (dC,) but inversely proportional to the differential of the distance, z, by which there is the diffusion occurs (dz). The proportionality constant being the volumetric diffusivity D. In mathematics, dCA NA -D, A NA/A is called the molar flux and is constant throughout any distance. Considering a perfect gas at 25°C, with initial pressure of 0.8 atm diffusing through one (1) meter distance, by which the exit pressure is 0.2 atm; it has a diffusivity of 0.121 cm²/s at 25°C. Calculate the molar flux of dz the gas in mole/s-m².

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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The Fick's Law of Molecular Diffusion states that the mole of substance A being transferred per time (NA) per unit area (A) is proportional to the negative of the differential of the concentration (dC,) but inversely proportional to the differential of the distance, z, by which there is the diffusion occurs (dz). The proportionality constant being the volumetric diffusivity D,. In mathematics, NA dCA %3D A dz NAJA is called the molar flux and is constant throughout any distance. Considering a perfect gas at 25°C, with initial pressure of 0.8 atm diffusing through one (1) meter distance, by which the exit pressure is 0.2 atm; it has a diffusivity of 0.121 cm²/s at 25°C. Calculate the molar flux of the gas in mole/s-m².
Transcribed Image Text:The Fick's Law of Molecular Diffusion states that the mole of substance A being transferred per time (NA) per unit area (A) is proportional to the negative of the differential of the concentration (dC,) but inversely proportional to the differential of the distance, z, by which there is the diffusion occurs (dz). The proportionality constant being the volumetric diffusivity D,. In mathematics, NA dCA %3D A dz NAJA is called the molar flux and is constant throughout any distance. Considering a perfect gas at 25°C, with initial pressure of 0.8 atm diffusing through one (1) meter distance, by which the exit pressure is 0.2 atm; it has a diffusivity of 0.121 cm²/s at 25°C. Calculate the molar flux of the gas in mole/s-m².
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