The diffusion co-efficient of Ni in Cu at 1000 K is 1.93 × 10-16 m2S-1 and it is 1.94 × 10-14 m2S- 1 at 1200 K. The activation energy (in k. J.mole-1) for the diffusion of Ni in Cu is_________________?
Correct answer: C
Explanation
The activation energy is calculated using the Arrhenius equation by plotting ln(D/T) vs 1/T. The value closest to 230 kJ/mol is derived from these data points.