Using the Tabulation of Diffusion Data, answer the following: (a) Calculate the diffusion coefficient for Cu in Alat 530C. i m2/s (Use scientific notation.) (b) What time in h) will be required at 610C to produce the same diffusion result (in terms of concentration at a specific point) as for 11 h at 530C? i h Tabulation of Diffusion Data Diffusing Species Fe D.(m/s) 2.8 x 10-4 Activation Energy Od kJ/mol eV/atom 251 2.60 Host Metal a-Fe (BCC) y-Fe (FCC) a-Fe Fe 5.0 x 10-5 284 2.94 6.2 x 10-7 80 0.83 -Fe 2.3 x 10-5 148 1.53 Calculated Values T(C) D(m/s) 500 3.0 x 10-21 900 1.8 X 10-15 900 1.1 x 10-17 1100 7.8 x 10-16 500 2.4 x 10-12 900 1.7 X 10-10 900 5.9 X 10-12 1100 5.3 X 10-11 500 4.2 x 10-19 500 4.0 X 10-18 500 4.2 X 10-14 500 4.1 x 10-14 500 1.9 X 10-13 500 1.3 x 10-22 Cu 211 Cu Zn Cu 189 Al 7.8 x 10-5 2.4 x 10-5 2.3 x 10-4 6.5 x 10-5 1.2 x 10-4 2.7 x 10-5 Al Cu Mg Cu 2.19 1.96 1.49 1.41 1.35 2.65 144 136 131 Al Ni 256