The preexponential and activation energy for the diffusion of iron in cobalt are 1.1 x 10-5 m?/s and 253,300 J/mol, respectively. At what temperature will the diffusion coefficient have a value of 2.1 x 10-14 m/s? The activation energy for the diffusion of car- bon in chromium is 111,000 J/mol. Calculate the diffusion coefficient at 1100 K (827°C), given that D at 1400 K (1127°C) is 6.25 x 10-11 m/s.

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The preexponential and activation energy for
the diffusion of iron in cobalt are 1.1 × 10-5
m/s and 253,300 J/mol, respectively. At what
temperature will the diffusion coefficient
have a value of 2.1 × 10-14 m²/s?
The activation energy for the diffusion of car-
bon in chromium is 111,000 J/mol. Calculate
the diffusion coefficient at 1100 K (827°C),
given that D at 1400 K (1127°C) is 6.25 x
10-11 m/s.
Transcribed Image Text:The preexponential and activation energy for the diffusion of iron in cobalt are 1.1 × 10-5 m/s and 253,300 J/mol, respectively. At what temperature will the diffusion coefficient have a value of 2.1 × 10-14 m²/s? The activation energy for the diffusion of car- bon in chromium is 111,000 J/mol. Calculate the diffusion coefficient at 1100 K (827°C), given that D at 1400 K (1127°C) is 6.25 x 10-11 m/s.
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