Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Question
Hydrogen peroxide decomposes into water and oxygen by the following reaction:
H2O2 -> H2O + O2
In the presence of hydrogen bromide mechanism changes to:
1) H2O2 + HBr -> HBrO + H2O
2) HBrO + H2O2 -> H2O + O2 + HBr
Experimental evidence tells us that this reaction is first order with respect to hydrogen peroxide with ΔHrxn = -94.64 kJ/mol. Consider the reaction energy diagram and answer the following questions :
- How many elementary steps are in the uncatalyzed reaction?
- How many elementary steps are in the catalyzed reaction?
- Which step in the catalyzed mechanism is endothermic (first or second)?
- Which step is rate-limiting (first or second)?
- Estimate the Eact (kJ) for the rate-determining step
- Give the formula and the name of the reaction intermediate
![Potential energy
2H₂O2
2H₂O₂ + 2Br +2H+
Reaction progress
2H₂O2+ O₂
2H₂O₂+ O₂ +
2Br +2H+](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ff21c578f-630a-4bda-885a-34e1a76e1b04%2F6e2780cf-4236-46e5-9828-f2b6f0939201%2F14s30xb_processed.png&w=3840&q=75)
Transcribed Image Text:Potential energy
2H₂O2
2H₂O₂ + 2Br +2H+
Reaction progress
2H₂O2+ O₂
2H₂O₂+ O₂ +
2Br +2H+
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