The diffusion coefficient for carbon in a-Fe is 2.4 x 10-12 m2/s at 500 °C and 1.7 x 10-10 m2/s at 900 °C. The activation energy for diffusion of carbon in a-Fe is most nearly a. 80,000 kJ/mol c. 80 kJ/mol b. 40 kJ/mol d. 60 kJ/mol

Introduction to Chemical Engineering Thermodynamics
8th Edition
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Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
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Chapter1: Introduction
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The diffusion coefficient for carbon in a-Fe is 2.4 x 10-12 m2/s at 500 °C and 1.7 x 10-10 m2/s at 900 °C. The activation energy for diffusion of carbon in a-Fe is most nearly
a.
80,000 kJ/mol
c.
80 kJ/mol
b.
40 kJ/mol
d.
60 kJ/mol
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