(a) From the curves shown in Figure 11.11 and using Equation 11.18,determine the rate of recrystallization for pure copper at the severaltemperatures.(b) Make a plot of ln(rate) versus the reciprocal of temperature (in K1), anddetermine the activation energy for this recrystallization process. (SeeSection 6.5.)(c) By extrapolation, estimate the length of time required for 50%recrystallization at room temperature, 20°C (293 K).
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