Question 8 A sheet of steel 3 mm thick is exposed on one side to a nitrogen-rich atmosphere at 1200°C and is permitted to achieve a steady-state diffusion condition. It is known that from the high- pressure nitrogen-rich side, the concentration of nitrogen on the steel surface is 6 kg/m³. The diffusion coefficient for nitrogen in steel at this temperature is 5x10-11 m²/s, and the diffusion flux is found to be 1.6 x 107 kg/m? s. How far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3? Assume a linear concentration profile. The Fick's first law is given by the equation: dC J = -D dx
Question 8 A sheet of steel 3 mm thick is exposed on one side to a nitrogen-rich atmosphere at 1200°C and is permitted to achieve a steady-state diffusion condition. It is known that from the high- pressure nitrogen-rich side, the concentration of nitrogen on the steel surface is 6 kg/m³. The diffusion coefficient for nitrogen in steel at this temperature is 5x10-11 m²/s, and the diffusion flux is found to be 1.6 x 107 kg/m? s. How far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3? Assume a linear concentration profile. The Fick's first law is given by the equation: dC J = -D dx
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:Question 8
A sheet of steel 3 mm thick is exposed on one side to a nitrogen-rich atmosphere at 1200°C
and is permitted to achieve a steady-state diffusion condition. It is known that from the high-
pressure nitrogen-rich side, the concentration of nitrogen on the steel surface is 6 kg/m³. The
diffusion coefficient for nitrogen in steel at this temperature is 5x10-11 m²/s, and the diffusion
flux is found to be 1.6 x 107 kg/m²s. How far into the sheet from this high-pressure side will
the concentration be 2.0 kg/m3? Assume a linear concentration profile.
The Fick's first law is given by the equation:
dC
J = -D
dx
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