Answer:
The diffusion flux is .
Explanation:
Given that,
Diffusion flux
Temperature = 1220°C =1493 K
Concentration gradient = -500 kg/m⁴
Diffusion energy = 145000 J/mol
We need to calculate the diffusion coefficient
Using formula of diffusion flux
Where, J = diffusion flux
= pre exponential factor
= Concentration gradient
Put the value into the formula
Using formula of diffusion coefficient formula
Where, D = diffusion coefficient
R = gas constant
T = temperature
Put the value of D₀ into the formula
Now, we need to calculate the D at 1273 K
We need to calculate the diffusion flux
Hence, The diffusion flux is .