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yangjalimesh
Asked: 2021-06-20T13:35:51+05:30 In:

The time taken for 50% recrystallization of cold worked Al is 100 hours at 500 K and 10 minutes at 600 K. Assuming Arrhenius kinetics, the activation energy for recrystallization in kJ is (A) 50 (B) 80 (C) 160 (D) 320

The time taken for 50% recrystallization of cold worked Al is 100 hours at 500 K and 10 minutes at 600 K. Assuming Arrhenius kinetics, the activation energy for recrystallization in kJ is (A) 50 (B) 80 (C) 160 (D) 320
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    3 Answers

    1. Myself

      is it 160 kj

      is it 160 kj

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    2. Platinum GATE 2021 QUALIFIED

      The activation energy is coming 159.53 Kj/mol

      The activation energy is coming 159.53 Kj/mol

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      The time taken for 50% recrystallization of cold worked Al is 100 hours at 500 K and 10 minutes at 600 K. Assuming Arrhenius kinetics, the activation energy for recrystallization in kJ is (A) 50 (B) 80 (C) 160 (D) 320
      • 0

    3. The times for a 50% recrystallization of pure copper are 1 minute at 162 °C and 1,000 minutes at 72 °C. Estimate the time for 50% recrystallization at 20 °C. Discuss what changes you expect to occur in the mechanical properties of a cold worked copper over a period of 10 years.   (Answer: t=260Read more

      The times for a 50% recrystallization of pure copper are 1 minute at 162 °C and 1,000 minutes at 72 °C. Estimate the time for 50% recrystallization at 20 °C. Discuss what changes you expect to occur in the mechanical properties of a cold worked copper over a period of 10 years.

       

      (Answer: t=260 days)

       

      34°C Light

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