5. Draw a qualitative energy diagram for a two-step reaction with Keq >1. Assume that the first step is slower than the second step. Label fully the reactants, products, transition states, intermediate, activation energies and the net change in energy.

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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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**Problem 5:**

Draw a qualitative energy diagram for a two-step reaction with Keq >1. Assume that the first step is slower than the second step. Label fully the reactants, products, transition states, intermediate, activation energies, and the net change in energy.

**Answer:**

[Create a diagram based on the following explanation.]

1. **Reactants**: Start with the initial energy level on the left side of the diagram.

2. **First Transition State**: Represent the first peak on the diagram, indicating the highest energy point for the first step.

3. **Intermediate**: Include an energy trough after the first transition state, representing a somewhat stable intermediate state.

4. **Second Transition State**: Show a second peak after the intermediate but lower than the first transition state, since the second step is faster.

5. **Products**: End with a lower energy level than the reactants, indicating an exothermic reaction and a Keq > 1.

6. **Activation Energies**: Draw arrows from the reactants to the first transition state and from the intermediate to the second transition state to depict the activation energies for each step.

7. **Net Change in Energy**: Use an arrow from the reactants to the products to indicate the overall change in energy.

**Note**: Label each part clearly on the diagram for educational purposes.
Transcribed Image Text:**Problem 5:** Draw a qualitative energy diagram for a two-step reaction with Keq >1. Assume that the first step is slower than the second step. Label fully the reactants, products, transition states, intermediate, activation energies, and the net change in energy. **Answer:** [Create a diagram based on the following explanation.] 1. **Reactants**: Start with the initial energy level on the left side of the diagram. 2. **First Transition State**: Represent the first peak on the diagram, indicating the highest energy point for the first step. 3. **Intermediate**: Include an energy trough after the first transition state, representing a somewhat stable intermediate state. 4. **Second Transition State**: Show a second peak after the intermediate but lower than the first transition state, since the second step is faster. 5. **Products**: End with a lower energy level than the reactants, indicating an exothermic reaction and a Keq > 1. 6. **Activation Energies**: Draw arrows from the reactants to the first transition state and from the intermediate to the second transition state to depict the activation energies for each step. 7. **Net Change in Energy**: Use an arrow from the reactants to the products to indicate the overall change in energy. **Note**: Label each part clearly on the diagram for educational purposes.
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