Course Home View Available Hint(s) HA Figure 1 of 2 (> Value activation energy = Units Uncatalyzed Reaction 400 Submit 300 Part B reactants 200 What is the value of the enthalpy change of the uncatalyzed reaction? Express your answer to three significant figures and include the appropriate units. 100 products • View Available Hint(s) Reaction coordinate HA P Pearson urch gias a Vision! He gives the Fiaances and let Him handle He gueaventa Insert F12 F11 Hom F10 F9 F8 Back F7 F2 F6 F3 F5 F4 & 9. 8. Potentlal energy (kJ)

Course Home View Available Hint(s) HA Figure 1 of 2 (> Value activation energy = Units Uncatalyzed Reaction 400 Submit 300 Part B reactants 200 What is the value of the enthalpy change of the uncatalyzed reaction? Express your answer to three significant figures and include the appropriate units. 100 products • View Available Hint(s) Reaction coordinate HA P Pearson urch gias a Vision! He gives the Fiaances and let Him handle He gueaventa Insert F12 F11 Hom F10 F9 F8 Back F7 F2 F6 F3 F5 F4 & 9. 8. Potentlal energy (kJ)

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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grade 12 chemistry:
The following initial rate data was collected for the reaction: Experi ment 1 2 HI (g) + C₂H5l (g) --> C₂H6 (g) + 1₂ (g) 3 [HI] 0.015 M 0.030 M 0.030 M [C₂H51] 0.900 M 0.900 M 0.450 M Initial Rate 4.01 x 10 5 M/S 8.04 x 10 5 M/s 3.99 x 10 5 M/S
Classify the actions based on how they could affect a reaction rate. Rate increases Rate decreases Rate is unaffected Answer Bank decrease the concentration of a reactant decrease the surface area of a solid reactant increase the temperature add a catalyst
7. Reactions A and B were studied and found to produce the given energy diagrams. 150 150 Energy 100 (kJ/mol) 100 Energy (kJ/mol) 50 50 Reaction progress Reaction progress Reaction A Reaction B A third reaction, C was studied with a measured activation energy of 55 KJ/mol. Assume all reactions take place at the same temperature. Reaction A is slowest a. b. Reaction B is slowest c. Reaction C is slowest d. All reactions happen at the same rate.
Consider a hypothetical chemical reaction: A+B → C+D (In this equation A, B, C and D stand for some unknown chemical formulas.) Here is an energy diagram for the reaction: energy (kJ/mol) 400 300 200 100 0 C + D SCA A + B reaction coordinate Use the energy diagram to answer these questions. What is the heat of reaction? Is the reaction exothermic or endothermic? Can you determine the activation energy? Can you determine the activation energy of the reverse reaction? C+DA+B kJ/mol Exothermic Endothermic Neither Yes, No. it's No. kJ/mol Yes, it's kJ/mol
Two diagrams of reactions are shown. What is the change in energy and activation energy for each?
All other factors held constant, which graph represents the sample/reaction with the largest value of k? The vertical line in each case represents the activation energy for the reaction.
Which of the following will decrease the activation energy, Ea, of a reaction? O Increasing the reactant concentrations Removing the products as they form O Increasing the temperature O Adding a catalyst O Decreasing the pressure A Moving to another question will save this response. M esc 20 F3 F1 F2 F4 F5 @ #3 24 4 Q W R. A
> A Moving to another question will save this response. estion 19 Consider the reaction in aqueous solution: 3r + S20g2- → 13 + 2 SO42- Under a given set of conditions, the concentration of 13 changes from 0,0 M to 7,6 x 10-4 M in 20 seconds. Calculate A[SO2yAt (in mol/L-s) for this time interval. O -6.5 x 10-5 mol/L-s O 5.0 x 10-5 mol/L·s O 1.2 x 10-5 mol/L·s O 7.6 × 10-5 mol/L·s O -5.0 x 105 mol/L-s A Moving to another question will save this response. MacBook Air F6 F5 吕口 F4 F3 F2 F1 #3 24 % 7 6. 4. 2 00
Use the information given in the following paragraph and energy diagram to answer questions 5-10. The mechanism for the reaction 2A D is illustrated in the following energy diagram where the X- axis is "reaction progress" and the Y-axis is "enthalpy". A is the reactant and D is the product. The reaction has a rate constant of 5.0x102² Mr¹ sec" when no catalyst is present. The equilibrium constant for the overall reaction at 25°C is K [D] = -=1.1×102. [A]² R D 9. You proposed the following mechanism for the overall reaction 2A D based on the energy diagram Step 1. A B (slow), with forward rate constant, k₂ (fast equilibrium), with forward rate constant, k₁, reverse rate constant k.] and equilibrium constant, K₁. Step 2. B 2C Step 3. A+2C D (fast), with forward rate constant, k3 Your classmate pointed out that your mechanism is incorrect. Why is your mechanism incorrect? a. Your mechanism does not incorporate the use of a catalyst b. Your mechanism is not consistent with the experimental…
400 300 + energy 200 - (kJ/mol) с +D 100 A + В reaction coordinate Use the energy diagram to answer these questions. I KJ/mol What is the heat of reaction? Exothermic Is the reaction exothermic or endothermic? Endothermic Neither Yes, it's kJ/mol Can you determine the activation energy? No. Can you determine the activation energy of the reverse reaction? Yes, it's kJ/mol С+D- A+B No.
Which of the following reactions would you expect to be most vigorous?