Consider a diffusion couple between silver and a gold alloy that contains 10 wt% silver. This couple is heat treated at an elevated temperature and it was found that after 850 s the concentration of silver had increased to 12 wt% at 10 μm from the interface into the Ag-Au alloy. Assuming pre-exponential and activation energy values of 7.2 ( 10-6 m2/s and 168,000 J/mol, compute the temperature of this heat treatment. (Note: you may find Figure 5.13 and Equation 5.15 helpful.)