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3. You propose two reaction mechanisms for a reaction you are studying. You experimentally determine that the overall reaction is 1st order with respect to (CH3)3CBr and Oth order with respect to cyanide. Which mechanism(s) is/are valid? Explain your answer. Mechanism A Step 1: (CH3)3CBr (CH3) C++ Br ->>> Step 2: (CH3)3CCN(CH3)3CCN Overall: (CH3)3CBr + CN→ (CH3)3CCN + Br Mechanism B Single-step: (CH3)3CBr +CN (CH3)3CCN + Br 4. On the axes below, draw the energy diagram of a one-step, exothermic reaction with an activation energy of 40 kJ/mol and a AH of -30 kJ/mol. Then, draw another curve corresponding to the reaction in the presence of a catalyst that reduces the activation energy by 20 kJ/mol. 100 80 Energy (kJ/mol) 80 60 40 40 20 20 reactants Reaction progress

3. You propose two reaction mechanisms for a reaction you are studying. You experimentally determine that the overall reaction is 1st order with respect to (CH3)3CBr and Oth order with respect to cyanide. Which mechanism(s) is/are valid? Explain your answer. Mechanism A Step 1: (CH3)3CBr (CH3) C++ Br ->>> Step 2: (CH3)3CCN(CH3)3CCN Overall: (CH3)3CBr + CN→ (CH3)3CCN + Br Mechanism B Single-step: (CH3)3CBr +CN (CH3)3CCN + Br 4. On the axes below, draw the energy diagram of a one-step, exothermic reaction with an activation energy of 40 kJ/mol and a AH of -30 kJ/mol. Then, draw another curve corresponding to the reaction in the presence of a catalyst that reduces the activation energy by 20 kJ/mol. 100 80 Energy (kJ/mol) 80 60 40 40 20 20 reactants Reaction progress

Chemistry by OpenStax (2015-05-04)
Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter12: Kinetics
Section: Chapter Questions
Problem 50E: For the past 10 years, the unsaturated hydrocarbon 1, 3-butadiene (CH2 = CH - CH = CH2) has ranked...
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3. You propose two reaction mechanisms for a reaction you are studying. You experimentally determine that the overall reaction is 1st order with respect to (CH3)3CBr and Oth order with respect to cyanide. Which mechanism(s) is/are valid? Explain your answer. Mechanism A Step 1: (CH3)3CBr (CH3) C++ Br ->>> Step 2: (CH3)3CCN(CH3)3CCN Overall: (CH3)3CBr + CN→ (CH3)3CCN + Br Mechanism B Single-step: (CH3)3CBr +CN (CH3)3CCN + Br 4. On the axes below, draw the energy diagram of a one-step, exothermic reaction with an activation energy of 40 kJ/mol and a AH of -30 kJ/mol. Then, draw another curve corresponding to the reaction in the presence of a catalyst that reduces the activation energy by 20 kJ/mol. 100 80 Energy (kJ/mol) 80 60 40 40 20 20 reactants Reaction progress
Transcribed Image Text:3. You propose two reaction mechanisms for a reaction you are studying. You experimentally determine that the overall reaction is 1st order with respect to (CH3)3CBr and Oth order with respect to cyanide. Which mechanism(s) is/are valid? Explain your answer. Mechanism A Step 1: (CH3)3CBr (CH3) C++ Br ->>> Step 2: (CH3)3CCN(CH3)3CCN Overall: (CH3)3CBr + CN→ (CH3)3CCN + Br Mechanism B Single-step: (CH3)3CBr +CN (CH3)3CCN + Br 4. On the axes below, draw the energy diagram of a one-step, exothermic reaction with an activation energy of 40 kJ/mol and a AH of -30 kJ/mol. Then, draw another curve corresponding to the reaction in the presence of a catalyst that reduces the activation energy by 20 kJ/mol. 100 80 Energy (kJ/mol) 80 60 40 40 20 20 reactants Reaction progress
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