6. Consider the following two-step reaction H H-CI [1] H + :CI: [2] H -CI H a. If the overall AH is negative for this reaction, sketch an energy diagram for the reaction. i. Indicate the AH for the product and reactants ii. Indicate whether the overall reaction is exothermic or endothermic iii. Indicate the rate determining step in the reaction. iv. Indicate the activation energy, E, at the relevant points in the diagram

6. Consider the following two-step reaction H H-CI [1] H + :CI: [2] H -CI H a. If the overall AH is negative for this reaction, sketch an energy diagram for the reaction. i. Indicate the AH for the product and reactants ii. Indicate whether the overall reaction is exothermic or endothermic iii. Indicate the rate determining step in the reaction. iv. Indicate the activation energy, E, at the relevant points in the diagram

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 4 Which of the following statements is TRUE about catalysts- a. They lower the Ea for at least one step in a chemical. reaction mechanism. Ob. Catalysts help a reaction to form a higher yield of products. Oc. C. They lower the AH for at least one step in the reaction mechanism. Cd. Catalysts have to be in the same phase as the reagents to be effective.
a.) catalyst b.) product c.) intermediate d.) reactant
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1. Which of the following is an elementary reaction?A. 2 ClO ---------- Cl2 + O2 Rate = k [ClO] B. N2 + O2 --------- 2 NO Rate = k [N2] [O2]C. NO + O3 --------- NO2 + O2 Rate = k [NO]2D. 2 O3 ------------ 3 O2 Rate = k [O3]
A hypothetical reaction is shown with the reaction coordinate diagram. How many steps are in the reaction mechanism? VI Reaction Progress O6
3. Draw a reaction energy diagram, and label the product (P), reactant (R), transition states (TS1, TS2, etc.), intermediates (INT1, INT2, etc.) and activation energies (AG‡₁, AG 2, etc.) for a reaction with the following criteria: i. A three-step, endothermic reaction; ii. AG3 > 0 but AG₁ AG‡₁ >> AG‡₂. Which species does the structure of the transition state of the rate-determining step resemble?
Consider the following mechanism: Cl2 → Cl+ + Cl- Cl- + H2S → HCl + HS- Cl+ + HS- → HCl + S What is the role of Cl+? A. product B. intermediate C. catalyst D. reactant
Pracdne o8 Consider the following reaction co-ordinate diagram H20 H20 Br A D Energy Reaction Co-ordinate a) Identify the various species on the diagram by adding the letter identifying each of the structures. b) Which species does the first transition state of the overall reaction most resemble? What kind of transition state is this? c) Which species does the second transition state of the overall reaction most resemble? What kind of transition state is this?
Given that :- Reaction => A + 2B ---> products Exp. Intial concentration [A] (mol/L) intial concentration [B] (mol/L) intial rate (mol/Ls) 1 0.115 0.135 2.70 × 10-3 2 0.115 0.270 2.16 × 10-2 3 0.345 0.135 8.10 × 10-3 What is the order of the reaction with respect to A, with respect to B, and overall?
Under certain conditions the reaction H2O2 + 3I + 2H*→ I3¯ + 2H2O occurs by the following series of steps: ki Step 1. H2O2+H* =H;O2" + with K (equilibrium constant) = k1/k-1 Step 2. H3O2* +I→ H2O + HOI (slow, rate constant k2) Step 3. HỘI + I→ OH¯ +I2 (fast, rate constant k3) Step 4. OH + H*→ H2O (fast, rate constant k4) Step 5. I2 + I→ 13 (fast, rate constant k5) Use approximations (RDS, eq, steady-state) if necessary The rate constant k for the reaction would be given by