Question
Asked Sep 19, 2019
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Dariana
Using the Arrhenius equation to calculate Ea from k versus T da...
The rate constant k for a certain reaction is measured at two different temperatures:
temperature
2.7 x 109
311.0 C
7.3x 109
444.0 C
Assuming the rate constant obeys the Arrhenius equation, calculate the activation energy Efor this reaction
Round your answer to 2 significant digits.
kJ
E
mol
X
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Dariana Using the Arrhenius equation to calculate Ea from k versus T da... The rate constant k for a certain reaction is measured at two different temperatures: temperature 2.7 x 109 311.0 C 7.3x 109 444.0 C Assuming the rate constant obeys the Arrhenius equation, calculate the activation energy Efor this reaction Round your answer to 2 significant digits. kJ E mol X

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Expert Answer

Step 1

According to Arrhenius Equation: 

The rate of a chemical reaction is a function of the absolute temperature T of the system.

 

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k-Ae RT Ais the pre-expanential facior Eisthe activation energy Risthe universal gascontant

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Step 2

According to Arrhenius equation taking the ratio of the two rate constants we have

The rate constant

Given,

 

K1=2.7 * 109

K2=27.3 * 109

 

T1= 311+273=584K

T2= 444 +273=717K

Step 3

Using Arrhenius equation taking the ratio...

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Ar K2 Ae 27*10 7.3x10 03698-e 03698 In0 3698 09917-Eax3824x10* Ea=09917 3.824x10 --0.260-105 Ea-2.6x10 /ml

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