Determine Activation Energy from rate?

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SUMMARY

The discussion centers on determining activation energy using the Arrhenius equation, specifically the formula LnK = LnA - Ea/RT. The professor provided the rate, pre-exponential factor A, and a temperature of 298K, but did not specify the rate constant K. The participant assumed a zeroth-order reaction, where the rate equals the rate constant, to calculate activation energy. This assumption led to confusion due to the lack of explicit details regarding the reaction type and rate law.

PREREQUISITES
  • Understanding of the Arrhenius equation and its components
  • Knowledge of reaction order, particularly zeroth-order reactions
  • Familiarity with the concept of activation energy (Ea)
  • Basic principles of chemical kinetics
NEXT STEPS
  • Study the Arrhenius equation in detail, focusing on its application in various reaction orders
  • Learn about different reaction orders and their implications on rate constants
  • Research methods for determining rate constants from experimental data
  • Explore the relationship between temperature and reaction rates in chemical kinetics
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Chemistry students, educators, and researchers interested in chemical kinetics and activation energy calculations.

jtruth914
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On my test the professor gave us the rate, parameters of A, and temperature of 298K. We were asked to find the activation energy. I know that the Arrhenius equation is LnK= LnA-Ea/RT. However, he did not give us the rate constant "K" instead he gave us the rate. How do you determine activation energy using the rate.
 
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Did he tell you the reaction, the concentration of reactants, and the rate law?
 
No he didn't. I assumed it was a zeroth order reaction where k=rate. Even though he didn't specify that. That's what confused me.
 

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