Answered: HH CEN 160 kJ/mol H3C-N=C: -99 kJ/mol…

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 Energy Diagram The diagram presented is a reaction energy profile, illustrating the potential energy changes as a chemical reaction progresses. The x-axis represents the reaction coordinate, indicating the progression from reactants to products. The y-axis shows the potential energy. #### Key Features: 1. **Reactants**: - The reactants are noted as $ \text{H}_3\text{C}-\stackrel{+}{\text{N}}\equiv\stackrel{-}{\text{C}}: $. 2. **Products**: - The products are illustrated as $ \text{H}_3\text{C}-\text{C}\equiv\text{N} : $. 3. **Transition State**: - At the peak of the curve, the transition state is represented, marked by a temporary high-energy formation. 4. **Activation Energy**: - The activation energy is the energy required to reach the transition state from the reactants, measured as 160 kJ/mol. 5. **Change in Energy**: - The energy change from reactants to products is indicated as -99 kJ/mol, meaning the reaction releases this amount of energy, suggesting it is exothermic. #### Summary: The diagram asks, “What is the activation energy of the above reaction?” The answer is 160 kJ/mol, corresponding to the energy needed to overcome to start the reaction and form the transition state from the reactants.$

Transcribed Image Text:### Reaction Energy Diagram The diagram presented is a reaction energy profile, illustrating the potential energy changes as a chemical reaction progresses. The x-axis represents the reaction coordinate, indicating the progression from reactants to products. The y-axis shows the potential energy. #### Key Features: 1. **Reactants**: - The reactants are noted as $ \text{H}_3\text{C}-\stackrel{+}{\text{N}}\equiv\stackrel{-}{\text{C}}: $. 2. **Products**: - The products are illustrated as $ \text{H}_3\text{C}-\text{C}\equiv\text{N} : $. 3. **Transition State**: - At the peak of the curve, the transition state is represented, marked by a temporary high-energy formation. 4. **Activation Energy**: - The activation energy is the energy required to reach the transition state from the reactants, measured as 160 kJ/mol. 5. **Change in Energy**: - The energy change from reactants to products is indicated as -99 kJ/mol, meaning the reaction releases this amount of energy, suggesting it is exothermic. #### Summary: The diagram asks, “What is the activation energy of the above reaction?” The answer is 160 kJ/mol, corresponding to the energy needed to overcome to start the reaction and form the transition state from the reactants.

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