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Usimov [2.4K]
2 years ago
14

If 5 J (joules) of electrical energy is used to power an iron, how many joules of heat and steam should it be transformed into?

Chemistry
1 answer:
a_sh-v [17]2 years ago
4 0

Answer:

maybe 25 joules

Explanation:

please mark me as a brainlist

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

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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}}

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= 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

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6 0
2 years ago
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