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2. At what temperature does D have a value of 6.75 x 10-13 m2/s For the diffusion of Cu in Al? (20 points) Diffusing Species Qu(J/mol Zn 189,000 Cur Host Metal Dom/s) Interdiffusion (Vacancy) Cu (FCC) 2.4 x 10- Zn (HCP) 2.1 x 10+ Al (FOC) 6.5 x 10-5 Al (FCC) 1.2 x 10- Ni (FCC) 2.7 x 10-5 Cu (FCC) 1.9 x 10-4 124,000 136,000 Cut Mg 130,000 Cue 256,000 230,000 Nid