Answered: A reaction profile (not to scale!) for…

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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$**Reaction Profile for the Reaction $\text{O}_3 + \text{NO} \rightarrow \text{O}_2 + \text{NO}_2$** This diagram illustrates the energy changes during the chemical reaction between ozone ($\text{O}_3$) and nitric oxide ($\text{NO}$) forming oxygen ($\text{O}_2$) and nitrogen dioxide ($\text{NO}_2$). The graph is not to scale. **Graph Explanation:** - **Y-Axis (E in kJ):** Represents the energy in kilojoules. - **X-Axis (Reaction Coordinate):** Represents the progression of the reaction from reactants to products. - **Curve:** Shows the energy pathway of the reaction. **Energy Levels:** - **Starting Energy (Reactants):** $\text{O}_3 + \text{NO}$ has an energy level marked on the diagram. - **Activation Energy (Ea):** The peak of the curve represents the energy of the activated complex, requiring an additional $11 \, \text{kJ}$ above the reactants' energy. - **Products Energy (O$_2$ + NO$_2$):** The energy level of the products is lower than the reactants. **Energy Change (ΔE):** - $200 \, \text{kJ}$ is the difference in energy from reactants to products, indicating that energy is released. **Which of the following are true?** *(Choose all that apply.)* - [ ] The energy of the products is **lower** than the energy of the reactants. - [x] ΔE is **positive**. - [x] The reaction is **exothermic**. - [ ] If the energy of the activated complex were **increased**, Ea would **increase**. This profile demonstrates that the reaction is exothermic, releasing more energy than initially absorbed, and the positive ΔE reflects the net energy release.$

Transcribed Image Text:**Reaction Profile for the Reaction $\text{O}_3 + \text{NO} \rightarrow \text{O}_2 + \text{NO}_2$** This diagram illustrates the energy changes during the chemical reaction between ozone ($\text{O}_3$) and nitric oxide ($\text{NO}$) forming oxygen ($\text{O}_2$) and nitrogen dioxide ($\text{NO}_2$). The graph is not to scale. **Graph Explanation:** - **Y-Axis (E in kJ):** Represents the energy in kilojoules. - **X-Axis (Reaction Coordinate):** Represents the progression of the reaction from reactants to products. - **Curve:** Shows the energy pathway of the reaction. **Energy Levels:** - **Starting Energy (Reactants):** $\text{O}_3 + \text{NO}$ has an energy level marked on the diagram. - **Activation Energy (Ea):** The peak of the curve represents the energy of the activated complex, requiring an additional $11 \, \text{kJ}$ above the reactants' energy. - **Products Energy (O$_2$ + NO$_2$):** The energy level of the products is lower than the reactants. **Energy Change (ΔE):** - $200 \, \text{kJ}$ is the difference in energy from reactants to products, indicating that energy is released. **Which of the following are true?** *(Choose all that apply.)* - [ ] The energy of the products is **lower** than the energy of the reactants. - [x] ΔE is **positive**. - [x] The reaction is **exothermic**. - [ ] If the energy of the activated complex were **increased**, Ea would **increase**. This profile demonstrates that the reaction is exothermic, releasing more energy than initially absorbed, and the positive ΔE reflects the net energy release.

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