The diffusion coefficients for species A in metal B are given at two temperatures: D (m²/s) 7.81 x 10-17 7.70× 10-16 i (b) Determine the value of Do. (a) Determine the value of the activation energy Qd (in J/mol). i T (°C) 1030 i 1260 J/mol m²/s (Use scientific notation.) (c) What is the magnitude of D at 1180°C? m²/s (Use scientific notation.)

The diffusion coefficients for species A in metal B are given at two temperatures: D (m²/s) 7.81 x 10-17 7.70× 10-16 i (b) Determine the value of Do. (a) Determine the value of the activation energy Qd (in J/mol). i T (°C) 1030 i 1260 J/mol m²/s (Use scientific notation.) (c) What is the magnitude of D at 1180°C? m²/s (Use scientific notation.)

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Atomic diffusion in solids

In material science, diffusion can take place in solid, liquid, and gases. In solids, atomic diffusion can take place with the help of thermally activated and randomly vibrating atoms. The atomic diffusion in solids is complex and very slow in comparison to atomic diffusion in liquids and gases because the interatomic distance between the atoms is smaller in solids as compared to liquids and gases.

Question

The diffusion coefficients for species A in metal B are given at two temperatures:
D (m²/s)
7.81 x 10-17
7.70x 10-16
i
(b) Determine the value of Do.
(a) Determine the value of the activation energy Qd (in J/mol).
i
T (°C)
1030
i
1260
J/mol
m²/s (Use scientific notation.)
(c) What is the magnitude of D at 1180°C?
m²/s (Use scientific notation.)

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