1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kifflom [539]
3 years ago
15

It is known that the kinetics of recrystallization for some alloy obey the Avrami equation andthat the value of n in the exponen

tial is 2.5. If, at some temperature, the fraction recrystallized is0.40 after 200 min, determine the rate of recrystallization at this temperature.
Chemistry
1 answer:
Paul [167]3 years ago
8 0

Answer:

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

Explanation:

For Avrami equation:

y = 1-e ^{(-kt^n)} \\ \\ e^{(-kt^n)} = 1-y\\ \\ -kt^n = In(1-y) \\ \\ k = \dfrac{-In(1-y)}{t^n}

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

k = \dfrac{-In(1-0.40)}{200^{2.5}}

k = 9.030 \times 10 ^{-7}

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

y = 1-e ^{(-kt^n)} \\ \\ e^{(-kt^n)} = 1-y\\ \\ -kt^n = In(1-y) \\ \\ t =[ \dfrac{-In(1-y)}{k}]^{^{1/n}}

t_{0.5} =[ \dfrac{-In(1-0.4)}{9.030 \times 10^{-7}}]^{^{1/2.5}}

= 200.00183 min

The rate of reaction for Avrami equation is:

rate = \dfrac{1}{t_{0.5}}

rate = \dfrac{1}{200.00183}

rate = 0.00499 / min

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

You might be interested in
PLZ HELP ME!!!!!! BEING TIMED!!!!!
amid [387]

Answer:

3 one

Explanation:

3 0
3 years ago
difference between an Argon atom with a mass number of 38 (Ar-38) and another Argon atom with a mass number of 45 (Ar-45)?
Kay [80]

The difference between Argon-38 and Argon - 45 is the number of neurons in their nuclei.

<h3>What is Isotope?</h3>

Isotopes are two or more types of atoms of the same element that have the same atomic number but differs in mass numbers due to different numbers of neutrons in their nuclei.

Argon atom with a mass number of 38 (Ar-38) - number of neutrons = 20

Argon atom with a mass number of 45 (Ar-45) - number of neutrons = 27

Thus, the difference between Argon-38 and Argon - 45 is the number of neurons in their nuclei.

Learn more about isotopes here: brainly.com/question/364529
#SPJ1

8 0
2 years ago
What is the boiling point for water in degrees celsius?
soldier1979 [14.2K]

Answer:

<h2>100°C is the boiling point of water in degrees Celsius</h2>
4 0
3 years ago
How long does it take for dental stitches to dissolve.
kotykmax [81]
2-7 days, but depends on the procedure
8 0
2 years ago
What is the source of energy that is released in an exothermic reaction? what absorbs the energy that is released ?
Nadusha1986 [10]
Hello,

Here are your answers:

The proper answers to your questions are....

1. "Chemical bond energy is converted to kinetic energy"...... which causes it to release energy around its surroundings!

2. "Endothermic reactions"...... Endothermic reactions are the things that absorb the energy!

If you need anymore help feel free to ask me!

Hope this helps!
5 0
3 years ago
Other questions:
  • Which best explains what happens when an electron moves from an excited state to the ground state? The electron absorbs energy a
    13·2 answers
  • Chemical Formula for Coffee?
    11·1 answer
  • 50 POINTS - FAIRLY SIMPLE QUESTION............. How does calcium carbonate react with rain when the rain is in the air, while ca
    14·2 answers
  • Which of the following is TRUE? a) A neutral solution contains [H2O] = [H3O⁺] b) A neutral solution does not contain any H3O+ or
    13·1 answer
  • For the following, identify the process as a spontaneous process, a nonspontaneous process, or an equilibrium process at the spe
    5·1 answer
  • Calculate the pZn of a solution prepared by mixing 25.0 mL of 0.0100 M EDTA with 50.0 mL of 0.00500 M Zn2 . Assume that both the
    7·1 answer
  • why do you think the partnership of rutherford a partical experiments, and bohr, a theoretical mathematician, was so succesful i
    10·1 answer
  • The Modern Cell Theory also states that all cells come from -
    7·1 answer
  • Calculate the energy needed to heat 10.5 g ice at -20.0 °C to liquid water at 75.0 °C. The heat of vaporization of water = 2257
    12·1 answer
  • Which use of pomace has become more available through new technologies?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!