A sheet of steel 1.7mm thick has nitrogen atmospheres on both sides and is permitted to achieve a steady-state diffusion condition. The diffusion coefficient for nitrogen in steel a is 7.55E-11 m2/s, and the diffusion flux is found to be 1.5E-7kg/m2 s. Also, it is known that the concentration of nitrogen in the steel at the high concentration is 5.17 kg/m3 while the lower concentration is 2.5 kg/m3 . How far XA (mm) will be from the sheet to reach the lower concentration?

Given that DAB= 7.55 X 10-11 m2/sdiffusion flux ,J = 1.5 x 10-7kgm2CA = 5.17 kgm3CB = 2.5 kgm3

Answered: A sheet of steel 1.7mm thick has…

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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A sheet of steel 1.7mm thick has nitrogen atmospheres on both sides and is permitted to achieve a steady-state diffusion condition. The diffusion coefficient for nitrogen in steel a is 7.55E-11 m²/s, and the diffusion flux is found to be 1.5E-7kg/m² s. Also, it is known that the concentration of nitrogen in the steel at the high concentration is 5.17 kg/m³while the lower concentration is 2.5 kg/m³ . How far X_A (mm) will be from the sheet to reach the lower concentration?

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