Chemistry Chemistry Practice Problems Solutions Library

Energy Diagram Solutions Library

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76 solutions

Energy Diagram

Q. Label this diagram.ΔEreactantsproductsEatransition state Which curve represents the catalyzed reaction?a) blue (top)b) green (bottom)

Solved • Mar 30, 2020

Energy Diagram

Q. Label this diagram ΔE   reactants   products   Ea   transition stateWhich curve represents the catalyzed reaction? a) Blue(top) b) green (bottom)

Solved • Mar 20, 2020

Energy Diagram

Q. Consider the Potential Energy vs. Reaction Coordinate diagram shown to the right. For each of the following questions, circle the best answer.If th...

Solved • Mar 16, 2020

Energy Diagram

Q. For the first-order reaction 1/2 N2O4(g) → NO2(g); ∆H = 28 kJ/molthe activation energy is 53 kJ/mol. What is the activation energy for the reverse ...

Solved • Feb 17, 2020

Energy Diagram

Q. Which of the following statements pertaining to the reaction coordinate plot below is/are correct.I. The overall reaction is endothermicII. The ove...

Solved • Jan 24, 2020

Energy Diagram

Q. Of the following, _______ will lower the activation energy for a reaction.a) increasing the concentrations of reactantsb) adding a catalyst for the...

Solved • Jan 20, 2020

Energy Diagram

Q. Which letter(s) correspond to intermediate(s) for the mechanism of the reaction depicted in the figure?a. Bb. Cc. Dd. Ee. A

Solved • Dec 16, 2019

Energy Diagram

Q. The activation energy for the reaction associated with the figure shown isa. B minus Ab. B minus Cc. D minus Ed. D minus Ce. D minus A

Solved • Dec 12, 2019

Energy Diagram

Q. The activation energy for the reaction associated with the figure shown isa. D minus Eb. D minus Cc. D minus Ad. B minus Ae. B minus C

Solved • Dec 11, 2019

Energy Diagram

Q. Draw the potential energy diagram for the combustion of propane:C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(g) + 2219.9 kJ

Solved • Aug 8, 2019

Energy Diagram

Q. Is the change in enthalpy positive or negative for an exothermic reaction?

Solved • Aug 7, 2019

Energy Diagram

Q. On a reaction energy profile diagram, how is an intermediate represented?

Solved • Dec 6, 2018

Energy Diagram

Q. Rate-determining steps in traffic flow on a toll road.For which of the two scenarios in the figure will one get from point 1 to point ...

Solved • Dec 6, 2018

Energy Diagram

Q. Suppose you could measure the rates for both the forward and reverse reactions of the process in the figure .In which direction would the rate be l...

Solved • Dec 6, 2018

Energy Diagram

Q. Suppose you could measure the rate constants for both the forward and reverse reactions of the process in Figure 14.16. In which direction would th...

Solved • Dec 6, 2018

Energy Diagram

Q. The following graph shows two different reaction pathways for the same overall reaction at the same temperature.Is each of the following statements...

Solved • Dec 6, 2018

Energy Diagram

Q. Draw a graph showing the reaction pathway for an overall exothermic reaction with two intermediates that are produced at different rates. On your g...

Solved • Dec 6, 2018

Energy Diagram

Q. Energy profiles for the uncatalyzed and bromide-catalyzed decomposition of H2O2.Where are the intermediates and transition states in this diagram?

Solved • Dec 6, 2018

Energy Diagram

Q. Based on the following reaction profile, how many intermediates are formed in the reaction AD?

Solved • Dec 6, 2018

Energy Diagram

Q. For the reaction A → D, is ΔE positive, negative, or zero?

Solved • Dec 6, 2018

Energy Diagram

Q. The gas-phase reaction Cl(g) + HBr(g)HCl(g) + Br(g) has an overall energy change of -66 kJ. The activation energy for the reaction is 7 kJ.What is ...

Solved • Dec 6, 2018

Energy Diagram

Q. The gas-phase reaction Cl(g) + HBr(g) → HCl(g) + Br(g) has an overall energy change of –66 kJ. The activation energy for the reaction is 7 kJ. Sket...

Solved • Dec 6, 2018

Energy Diagram

Q. Based on their activation energies and energy changes and assuming that all collision factors are the same, which of the following reactions would ...

Solved • Dec 6, 2018

Energy Diagram

Q. Energy profile for conversion of methyl isonitrile (H3CNC) to its isomer acetonitrile (H3CCN).How does the energy needed to overcome the energy bar...

Solved • Dec 6, 2018

Energy Diagram

Q. For the reaction A → C, is ΔE positive, negative, or zero?

Solved • Dec 6, 2018

Energy Diagram

Q. The following diagram shows the reaction profile of a reaction.Label the components indicated by the boxes.

Solved • Dec 6, 2018

Energy Diagram

Q. For the elementary process N2O5 (g) → NO2 (g) + NO3 (g) the activation energy (Ea) and overall E are 154 kJ/mol, and 136 kJ/mol, respectively.What ...

Solved • Dec 6, 2018

Energy Diagram

Q. The energy of activation for the decomposition of 2 mol of HI to H2 and I2 in the gas phase is 185 kJ. The heat of formation of HI(g) from H2 (g) a...

Solved • Dec 6, 2018

Energy Diagram

Q. Consider the following energy diagram showing the energy of a reaction as it progresses:How many elementary steps are involved in this reaction?

Solved • Dec 6, 2018

Energy Diagram

Q. Consider the following energy diagram showing the energy of a reaction as it progresses:Label the reactants, products, and intermediates.

Solved • Dec 6, 2018

Energy Diagram

Q. The following diagram shows the energy of a reaction as the reaction progresses. Label each of the following in the diagram:

Solved • Dec 6, 2018

Energy Diagram

Q. A chemical reaction is endothermic and has an activation energy that is twice the value of the enthalpy of the reaction. Draw a diagram depicting t...

Solved • Dec 6, 2018

Energy Diagram

Q. Draw a rough sketch of the energy profile for each of the following cases:b. ΔE = -10 kJ/mol, Ea = 50 kJ/mol

Solved • Nov 7, 2018

Energy Diagram

Q. For the following reaction profile, indicateb. the activation energy.

Solved • Nov 7, 2018

Energy Diagram

Q. The activation energy for some reaction X2 (g) + Y2 (g) → 2XY (g)is 167 kJ/mol, and ΔE for the reaction is 128 kJ/mol. What is the activation energ...

Solved • Nov 5, 2018

Energy Diagram

Q. The activation energy for the reactionNO2 (g) + CO (g) → NO (g) + CO2 (g)is 125 kJ/mol, and ΔE for the reaction is -216 kJ/mol. What is the activat...

Solved • Nov 5, 2018

Energy Diagram

Q. Consider the following reaction energy diagram:(a) How many elementary steps are in the reaction mechanism?

Solved • Nov 1, 2018

Energy Diagram

Q. Aqua regia, a mixture of HCl and HNO3, has been used since alchemical times to dissolve many metals, including gold.Its orange color is due to the ...

Solved • Nov 1, 2018

Energy Diagram

Q. For the reaction A2 + B2 ⟶2AB, Ea(fwd) = 125 kJ/mol and Ea(rev) = 85 kJ/mol. Assuming the reaction occurs in one step(a) draw a reaction energy dia...

Solved • Nov 1, 2018

Energy Diagram

Q. For the reaction A2 + B2 ⟶2AB, Ea(fwd) = 125 kJ/mol and Ea(rev) = 85 kJ/mol. Assuming the reaction occurs in one step(a) draw a reaction energy dia...

Solved • Nov 1, 2018

Energy Diagram

Q. For each of the following reaction diagrams, estimate the activation energy (Ea ) of the reaction:

Solved • Oct 31, 2018

Energy Diagram

Q. The activation energy for the reactionNO2(g) + CO(g) ⟶ NO(g) + CO2(g)is Ea = 100 kJ/mol and the change in enthalpy for the reaction is ΔH = -250 kJ...

Solved • Mar 22, 2018

Energy Diagram

Q. Label this diagram (energy of activations, transition state, products, starting materials, and enthalpy change)

Solved • Mar 22, 2018

Energy Diagram

Q. Label the energy diagram (7 bins).

Solved • Mar 19, 2018

Energy Diagram

Q. The diagram represents a spontaneous reaction. Use the diagram to answer the questions below.a. Is the reaction endothermic or exothermic?b. What i...

Solved • Mar 16, 2018

Energy Diagram

Q. What is the heat of reaction for Reaction A? What is the heat of reaction for Reaction B? What is the activation energy for Reaction A? What is the...

Solved • Feb 14, 2018

Energy Diagram

Q. i) What is the heat of reaction for Reaction A?  ii) What is the activation energy for Reaction A?

Solved • Feb 13, 2018

Energy Diagram

Q. Please refer to the charts. a. What is the value of the activation energy of the uncatalyzed reaction? b. What is the value of the enthalpy chang...

Solved • Dec 22, 2017

Energy Diagram

Q. A reaction coordinate diagram is shown below for the reaction of A to form E. Answer the following questions.i) Identify the transition state(s)?ii...

Solved • Dec 15, 2017

Energy Diagram

Q. Which reaction coordinate diagram represents a reaction in which the activation energy, Ea, is 50 kj.mol-1 and the ΔHrxn is -15 kj. mol-1?

Solved • Dec 15, 2017

Energy Diagram

Q. Label the following reaction coordinate diagram by matching between letters and numbers:

Solved • Dec 15, 2017

Energy Diagram

Q. Part AWhat is the value of the activation energy of the uncatalyzed reaction?Express your answer to three significant figures and include the appro...

Solved • Sep 26, 2017

Energy Diagram

Q. Label the energy diagram for a two-step reaction.

Solved • Sep 23, 2017

Energy Diagram

Q. Please refer to the charts. a) What is the value of the activation energy of the uncatalyzed reaction? activation energy = ____________ b) What ...

Solved • Sep 23, 2017

Energy Diagram

Q. For the reaction in the below diagram, explain whether the forward or reverse reaction greater in rate A. The reverse reaction because its activat...

Solved • Aug 9, 2017

Energy Diagram

Q. Four reactions are listed below with their energies indicated. Which of these reactions will have the fastest rate in the reverse? A. Rxn 1: ΔE = ...

Solved • Jul 25, 2017

Energy Diagram

Q. Consider the potential energy diagram below:What is the change in enthalpy (ΔH ) for the reaction A → B?a. -350 kJb. 100 kJc. -100 kJd. 350 kJ 

Solved • Apr 27, 2017

Energy Diagram

Q. Which of the following statements is true regarding the forward reaction based on the reaction profile shown below? i. The reaction is endothermic...

Solved • Apr 26, 2017

Energy Diagram

Q. Consider the figure below and choose the answer which identifies the rate limiting step for the forward reaction. A) R → I1 B) I1 → I2 C) I2 → P...

Solved • Apr 18, 2017

Energy Diagram

Q. For the reaction X + Y → Z + R which arrow represents the activation energy of the forward reaction? 1. e 2. f 3. a 4. c 5. d 6. b

Solved • Jan 27, 2017

Energy Diagram

Q. True or false: two reactions with identical activation energies will always have the same rate constant as long as the reactions are run at the sam...

Solved • Dec 23, 2016

Energy Diagram

Q. The potential energy profiles for three reactions are shown below.Which of the following is a  true statement?A) Endothermic rxns are always slower...

Solved • Nov 15, 2016

Energy Diagram

Q. The potential energy diagram shown to the right is for a specific reaction scheme. How many steps are in the reaction mechanism and which step is t...

Solved • Aug 15, 2016

Energy Diagram

Q. We can use a 2-D potential energy surface to depict the progress of a reaction. Given the following: a. The y-axis should be labeled as __________...

Solved • May 18, 2016

Energy Diagram

Q. Which line segment represents the activation energy for the reaction between  C and D to form A and B? (A) 1 → 4 (B) 2 → 3 (C) 2 → 4 (D) 3 → 4

Solved • May 10, 2016

Energy Diagram

Q. A certain reaction has a ΔH = –75 kJ and an activation energy of 40 kJ. A catalyst is found that lowers the activation energy of the forward reacti...

Solved • May 9, 2016

Energy Diagram

Q. Two reactions with different activation energies have the same rate at room temperature. Which statement correctly describes the rates of these two...

Solved • May 9, 2016

Energy Diagram

Q. Which reaction coordinate diagram represents a reaction in which the activation energy, Ea, is 50 kJ•mol –1 and the ΔHrxn is –15 kJ•mol –1?

Solved • Apr 26, 2016

Energy Diagram

Q. If a reaction has ∆H = −125 kJ/mol and an activation energy of 72.8 kJ/mol, what is the activation energy for the reverse reaction?   a) −52.2 kJ...

Solved • Mar 28, 2016

Energy Diagram

Q. The activation energy of a reaction is 7.5 kJ/mol and the change in enthalpy is −37.2 kJ/mol. What is the activation energy of the reverse reaction...

Solved • Mar 28, 2016

Energy Diagram

Q. Label the multi-step reaction energy diagram below using the letters corresponding to the labels on the left. There are more labels than needed; ea...

Solved • Feb 24, 2016

Energy Diagram

Q. For the chemical reaction system described by the diagram below which statement is true?  If the Ea for the forward reaction is 25 kJ/mol and the ...

Solved • Feb 21, 2016

Energy Diagram

Q. For the chemical reaction system described by the diagram below, which statement is true  A. The forward reaction is endothermic. B. The activati...

Solved • Feb 21, 2016

Energy Diagram

Q. With respect to the figure below, which choice correctly identifies all the numbered positions?  A. (1) catalyst, (2) intermediate, (3) activated ...

Solved • Feb 21, 2016

Energy Diagram

Q. The reaction C4H10 → C2H6 + C2H4 has an activation energy (Ea) of 350 kJ/mol, and the Ea of the reverse reaction is 260 kJ/mol. Estimate ΔH, in kJ/...

Solved • Feb 21, 2016

Energy Diagram

Q. A chemical reaction has an activation energy in the forward direction of 158 kJ/mol and a ΔE°  of reaction -67 kJ/mol. Calculate the energy of acti...

Solved • Feb 21, 2016