Nitrogen from a gaseous phase is to be diffused into pure iron at 700 degrees C. If the surface concentration is maintained at 0.27 wt% N, what will be the concentration (in weight percent) 3.0 mm from the surface after 7.1 h? The diffusion coefficient for nitrogen in iron at 700 degrees C is 2.3*10^-10 m^2/s. Z0.00 0.0000erf(z) Z erf(z) Z0.55 0.5633 1.30.025 0.0282 0.60 0.6039 1.40.05 0.0564 0.65 0.64200.10 0.1125 0.70 0.67780.150.16800.20 0.22270.350.30 0.32860.75 0.71120.25 0.2763 0.850.37940.80 0.7421 1.81.71.5 0.96610.45 0.4755 1.11.6 0.97630.95 0.8209 2.2erf(z)0.40 0.4284 1.0 0.8427 2.40.93400.95230.7707 1.90.90 0.7970 2.0 0.99530.50 0.5205 1.2 0.9103 2.80.98380.98910.99280.99810.99930.8802 2.6 0.99980.9999

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Answered: Nitrogen from a gaseous phase is to be…

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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Nitrogen from a gaseous phase is to be diffused into pure iron at 700 degrees C. If the surface concentration is maintained at 0.27 wt% N, what will be the concentration (in weight percent) 3.0 mm from the surface after 7.1 h? The diffusion coefficient for nitrogen in iron at 700 degrees C is 2.3*10^-10 m^2/s.