Answered: Add a curve to the graph showing how it…

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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Transcribed Image Text:### Energy Profile Diagram of a Chemical Reaction This graph illustrates the energy changes during the course of a chemical reaction. - **Horizontal Axis (Reaction progress):** Represents the progression of the reaction from reactants to products. - **Vertical Axis (Energy):** Indicates the potential energy of the system. #### Key Features: 1. **Reactants:** Point labeled as "1" on the graph represents the energy level of the reactants at the beginning of the reaction. 2. **Activation Energy (Ea):** The peak of the curve marked "2" represents the activation energy. This is the energy barrier that must be overcome for a reaction to proceed. It is the difference in energy between the reactants and the peak of the curve. 3. **Energy Released (ΔH):** The vertical distance labeled "3" shows the energy difference between reactants and products. This is the net energy change of the reaction, often referred to as the enthalpy change (ΔH). In this exothermic reaction, energy is released, and the products have lower energy than the reactants. 4. **Products:** Point "4" on the graph marks the energy level of the products at the end of the reaction. The products are at a lower energy level compared to the reactants, indicating that the reaction is exothermic.

Transcribed Image Text:**Instruction for Students:** Add a curve to the graph showing how it would be changed when catalyzed by an enzyme. (No need to submit your drawing). Using the same numbering system as the original figure, select the number(s) that would now have *different* values in your picture. - [ ] 1 - [ ] 2 - [ ] 3 - [ ] 4 **Explanation:** This task involves modifying a graph to show the effect of an enzyme on a chemical reaction. Enzymes typically lower the activation energy required for a reaction, which may change specific numerical values on the graph. When considering which numbers would change, think about how the enzyme affects the reaction’s rate or energy profile.

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