It is known that the kinetics of recrystallization for some alloy obey the Avrami equation andthat the value of n in the exponential is 2.5. If, at some temperature, the fraction recrystallized is0.40 after 200 min, determine the rate of recrystallization at this temperature.

rate of recrystallization = 4.99 × 10⁻³ min⁻¹

Explanation:

For Avrami equation:

To calculate the value of k which is a dependent variable for the above equation ; we have:

The time needed for 50% transformation can be determined as follows:

= 200.00183 min

The rate of reaction for Avrami equation is:

rate = 0.00499 / min

rate of recrystallization = 4.99 × 10⁻³ min⁻¹

the answer is barium and copper bromide

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