C2. A metal alloy is known to recrystallize in accordance with the Avrami equation, and that the value of n in the exponential is 2.1, for time in seconds. At

700°C, the fraction recrystallized is 0.3 in 30 min, what total time (in seconds) is required for the recrystallization reaction to go to 70% completion?

Fig: 1