Chemistry (including Biochemistry)/intro to chemistry II

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Expert: - 4/13/2004


Question
Hi-
Im working right now on finding the activation energy required for a certain problem.  We know the equation LnK=LnA-EA-/RT   
We substituted the given information
Ln(0.0120)=LnA-218000/(8.134)(525)
-4.423=LnA-5.0x10^1
Since e^ anything=anything we
e^4.56=e^LnA
We get that e^4.56=9.5X10^1 so..
9.5x10^1=A  well atleast in our minds it should, but the book along with our professor say it should be 7.1
We're very confused,any help would be greatly apreciated..
Thank you


Answer

-4.423=LnA-5.0x10^1

-4.423 + 50  = ln[A]

45.577  = ln[A] is one mistake

Are you using the correct R for the units?  Is the temperature in C or K?  With out the entire problem and units, I can't see your mistake and there is probably a fundamental one in your first step.  

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Chemistry (non-biochemistry), environmental science, occupational health and safety, environmental regulation and management, environmental engineering, and wastewater engineering. I'm the Director of Environmental, Health, and Safety and the Director of Research at the Institute of Textile Technology.

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Chemistry (non-biochemistry), environmental science, occupational health and safety, environmental regulation and management, environmental engineering, and wastewater engineering. I'm the Director of Environmental, Health, and Safety and the Director of Research at the Institute of Textile Technology.

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PhD, MS, BS in Chemistry

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