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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> 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
15) Answer the following questions by looking at the graph below. A catalyzed chemical reaction 90 A 75 PE (kJ) 65 50 Progress of the reaction i. What is the letter for the activation energy (E,) of the reaction? ii. What is the amount of activation energy in the presence of a catalyst? iii. Is the reaction exothermic or endothermic? 16) How much heat is needed to increase the temperature of a 38 g sample of lead from 38 "C to 52 °C? Specific heat of Pb = 0.128 J/g'C. (Show working out) 17). Identify if energy and/or matter are exchanged in an open, closed, and isolated system. Open- Closed- Isolated-
Draw the order of reaction graphs (reaction rate vs the concentration) for [NO] and [H2]. Explain the difference between the two graphs
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6. A student performs the reaction below in three experiments studying initial concentrations and initial rates. The data is summarized in the table below. SHOW ALL YOUR WORK. 2 NO(g) + Br₂(g) →2 NOBr(g) [NO] 0.80 1.60 0.80 [Br.] 0.60 0.60 1.20 Rate (mol/L.s) 0.14 0.28 0.56 a. What is the order of this reaction with respect to NO? b. What is the order of this reaction with respect to Br₂? c. What is the overall order of this reaction? d. What is the rate law constant, k, for this reaction? (Be sure to include the value and the units.)
Question 4 of 20 The reaction X + X3 2 X2 is shown to have an activation energy of 57 kJ/mol while the enthalpy of reaction (AH) is -388 kJ/mol. What is the activation energy of the reverse reaction? FI F3 F4 F6 F8 F9 F10 F12 23 & 7 8 9. E D G K 4
For the reaction of A B, which of the following statements about the rates of forward and reverse reactions is true at time z? Concentraton vs time Time W X y Z The rate of forward reaction is greater. The rate of reverse reaction is greater. The rates of forward and reverse reactions are equal. The relative rates of reaction cannot be determined from the graph. Concentration [B] [A]
12. Three concentration-time graphs for chemical reactions are shown below: Graph 1 Graph 2 Graph 3 [X] [X] [X] Time Time Time Which of the three graphs correctly shows a reaction in which the concentration of the reactant X would affect the rate of the reaction? a. Graph 1 only b. Graph 2 only c. Graphs 1 and 3 d. Graphs 1 and 2