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The diffusion coefficient for O-2 in Cr2O3 is D = 4 x 10-11 m2/s at 1150C and D= 6 x 10- 7 m2/s at 1715C.

The diffusion coefficient for O-2 in Cr2O3 is D = 4 x 10-11 m2/s at 1150C and D= 6 x 10- 7 m2/s at 1715C. Calculate the activation energy, Qd

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