Roole of Értergy in Roeactionts In order for a reaction to begin, energy is needed to form an Endothermic activated complex. The energy needed to form an activated complex is called activation energy. It comes from effective collisions. Activation energy is needed whether heat is absorbed or released during a chemical reaction. Heat absorbed or released during a chemical reaction is called heat of reaction or enthalpy (AH). Enthalpy is the difference between the potential energy of the products and the reactants (AH=H, reactions, ones in which energy is released, the potential energy of the products is lower than the potential energy of the reactants and AH is negative. For endothermic reactions, ones in which energy is absorbed, the potential energy of the products is higher than the potential energy of the reactants and AH is positive. Catalysts reduce the activation energy for both exothermic and endothermic reactions but have no effect on the change in enthalpy. C+D A+B(AH positive) Activation energy without catalyst Activated complex Activation energy with catalyst AH %3D 1products-Hreactants). In exothermic Potential energy of reactants Potential energy of products Reaction coordinate Answer the questions below based on the reading and the graph above, and based on your knowledge or chemistry. 1. Based on the graph above: a. Which has the highest energy-the reactants, the products, or the activated complex? Potential energy
Roole of Értergy in Roeactionts In order for a reaction to begin, energy is needed to form an Endothermic activated complex. The energy needed to form an activated complex is called activation energy. It comes from effective collisions. Activation energy is needed whether heat is absorbed or released during a chemical reaction. Heat absorbed or released during a chemical reaction is called heat of reaction or enthalpy (AH). Enthalpy is the difference between the potential energy of the products and the reactants (AH=H, reactions, ones in which energy is released, the potential energy of the products is lower than the potential energy of the reactants and AH is negative. For endothermic reactions, ones in which energy is absorbed, the potential energy of the products is higher than the potential energy of the reactants and AH is positive. Catalysts reduce the activation energy for both exothermic and endothermic reactions but have no effect on the change in enthalpy. C+D A+B(AH positive) Activation energy without catalyst Activated complex Activation energy with catalyst AH %3D 1products-Hreactants). In exothermic Potential energy of reactants Potential energy of products Reaction coordinate Answer the questions below based on the reading and the graph above, and based on your knowledge or chemistry. 1. Based on the graph above: a. Which has the highest energy-the reactants, the products, or the activated complex? Potential energy
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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