Question

Copper oxidizes to Cu₂O exhibiting parabolic behavior at temperatures above 500 °C. The activation energy for diffusion is 163 kJ/mol. If 0.011 cm of Cu₂O forms after exposure to air after 10 minutes at 625 °C, what will the oxide thickness be after exposure of a clean copper surface to air at 680 °C for 18 minutes?

Answer 1

Date : Solutions Case 1 oxide Checiness, a 0011 con Ta on 625°c time taken, to To min Casella oxide Chuê uness, __? z = boic میره ما relation The quien between diffusivity and temperature Do Do expl- od here, Do pre exformen RT) tial Ode Activation factor Videl empreende The diffusion energy 163k3m اسلایم عط mol Chickness of can as! 2² Det 2012 Dt 2 g_=96 40 min. Hy = collem Deexplores t 10min Do exp(-old elementti taxta RT = 0.01lem dy - 0.oll.cm exp - 163x13 Imeil 0.3145mila's [ 1625+233.1524 (600+273.15) leaders Jeu Der 0.007062 cm