Calculate the diffusion coefficient for magnesium in aluminum at 950 °C. The pre

Question

Calculate the diffusion coefficient for magnesium in aluminum at 950 °C. The pre- exponential constant and activation energy for this system are 1.2 × 10–4 m2/s and 130,000 J/mol, respectively. Calculate the diffusion coefficient for magnesium in aluminum at 950 °C. The pre- exponential constant and activation energy for this system are 1.2 × 10–4 m2/s and 130,000 J/mol, respectively. Calculate the diffusion coefficient for magnesium in aluminum at 950 °C. The pre- exponential constant and activation energy for this system are 1.2 × 10–4 m2/s and 130,000 J/mol, respectively.

Explanation / Answer

Magnesium and Aluminium are solids.Different Co-efficient can be found in different temperatures.These things can be determined by Arrhenius Equation.

D=D0e-Ea/ (kT)

D= Diffusion Co-efficient

D0 = Maximum Diffusion

Ea = Activation Energy

k= Boltzman Constant

T =Temperature

D=1.2x10-4 x e (-130000/ (1223x1.38x10-23))

D=1.2x10-4 m2/s

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