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2) The graph shows the energy reaction curves with and without a catalyst for a certain reaction. What does this graph tell you about catalysts? Ea without catalyst Potential energy Reactants E with catalyst Products Reaction progress

2) The graph shows the energy reaction curves with and without a catalyst for a certain reaction. What does this graph tell you about catalysts? Ea without catalyst Potential energy Reactants E with catalyst Products Reaction progress

Chemistry
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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### Energy Reaction Curves with and without a Catalyst #### Question: The graph shows the energy reaction curves with and without a catalyst for a certain reaction. What does this graph tell you about catalysts? #### Explanation of the Graph: The provided graph plots Potential Energy against Reaction Progress, comparing the energy reaction curves both with and without the presence of a catalyst. 1. **Axes:** - The **vertical axis** (Y-axis) represents **Potential Energy**. - The **horizontal axis** (X-axis) represents **Reaction Progress**. 2. **Curves:** - The **blue curve** represents the reaction without a catalyst. - The **red curve** represents the reaction with a catalyst. 3. **Key Points and Labels:** - **Reactants:** Marked where both the blue and red curves begin, at a higher energy level. - **Products:** Marked where both curves end, at a lower energy level. 4. **Activation Energy (\( E_a \)):** - **\( E_a \) without catalyst:** The energy barrier from the reactant level to the peak of the blue curve. - **\( E_a \) with catalyst:** The energy barrier from the reactant level to the peak of the red curve, which is notably lower than that of the blue curve. #### Interpretation: - **Catalysts Lower Activation Energy:** The significant takeaway from this graph is that the presence of a catalyst reduces the activation energy required for the reaction. This is evident as the red curve, representing the catalyzed reaction, has a lower peak than the blue curve. Essentially, catalysts facilitate reactions to occur more easily and quickly by reducing the needed activation energy. - **Energy of Reactants and Products:** It is important to note that the potential energy of the reactants and products remains unchanged. The catalyst influences only the pathway, not the relative energy levels of reactants and products. Understanding how catalysts operate is essential in fields like chemistry and biochemical engineering, where they play vital roles in increasing the efficiency of biochemical reactions.
Transcribed Image Text:### Energy Reaction Curves with and without a Catalyst #### Question: The graph shows the energy reaction curves with and without a catalyst for a certain reaction. What does this graph tell you about catalysts? #### Explanation of the Graph: The provided graph plots Potential Energy against Reaction Progress, comparing the energy reaction curves both with and without the presence of a catalyst. 1. **Axes:** - The **vertical axis** (Y-axis) represents **Potential Energy**. - The **horizontal axis** (X-axis) represents **Reaction Progress**. 2. **Curves:** - The **blue curve** represents the reaction without a catalyst. - The **red curve** represents the reaction with a catalyst. 3. **Key Points and Labels:** - **Reactants:** Marked where both the blue and red curves begin, at a higher energy level. - **Products:** Marked where both curves end, at a lower energy level. 4. **Activation Energy (\( E_a \)):** - **\( E_a \) without catalyst:** The energy barrier from the reactant level to the peak of the blue curve. - **\( E_a \) with catalyst:** The energy barrier from the reactant level to the peak of the red curve, which is notably lower than that of the blue curve. #### Interpretation: - **Catalysts Lower Activation Energy:** The significant takeaway from this graph is that the presence of a catalyst reduces the activation energy required for the reaction. This is evident as the red curve, representing the catalyzed reaction, has a lower peak than the blue curve. Essentially, catalysts facilitate reactions to occur more easily and quickly by reducing the needed activation energy. - **Energy of Reactants and Products:** It is important to note that the potential energy of the reactants and products remains unchanged. The catalyst influences only the pathway, not the relative energy levels of reactants and products. Understanding how catalysts operate is essential in fields like chemistry and biochemical engineering, where they play vital roles in increasing the efficiency of biochemical reactions.
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