Question

The diffusion coefficients for iron in nickel are given at two temperatures:T (K)D (m2/s)12739.4 × 10–1614732.4 × 10–14(a) Determine the values of D0 and the activation energy Qd.(b) What is the magnitude of D at 1100°C (1373 K)?

Answer 1

Answer:

The diffusion coefficients for iron in nickel are given at two temperatures:

T (K)        1273          1473

D ($m^{2}$/s) 9.4 × $10^{-16}$    2.4 × $10^{-14}$

(a) Determine the values of Do and the activation energy Qd.

(b) What is the magnitude of D at 1100°C (1373 K)?

A

The pre-exponential factor Do = 2.1 x $10^{-16}$

The activation energy Qd = 252,609 J/mol

B

The diffusion coefficient D= 5.14 x $10^{-15}$

Explanation:

The full explanation is contained in the attached images;