Oxidised chromium Cr2O3 has a diffusion coefficient of 5 ×10−15 cm2s−1 at 730 ℃ and is 2 ×10−9 cm2s−1 at 1430 ℃. Calculate the following parameters:(i) Activation energy Q.(ii) Constant ??.(b) The material stated in Question 3(a) has its atoms transferred from one lattice position to another at a rate of 4 ×105 jumps/s at 410 ℃. Apply suitable mathematical expressions and obtain the jump rate of the material at 650 ℃.

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Q. Question 3
(a) Oxidised chromium Cr2O3 has a diffusion coefficient of 5 ×10−15 cm2s−1 at 730 ℃ and is 2 ×10−9 cm2s−1 at 1430 ℃. Calculate the following parameters:
(i) Activation energy Q.

(ii) Constant ??.

(b) The material stated in Question 3(a) has its atoms transferred from one lattice position to another at a rate of 4 ×105 jumps/s at 410 ℃. Apply suitable mathematical expressions and obtain the jump rate of the material at 650 ℃.

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