Activation Energy

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Activation Energy

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The energy required to break the bonds in the reactants for a chemical reaction to occur.

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Step 1: Energy must be SUPPLIED to break chemical bonds of reactants.

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Energy is required to initiate the reaction.

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Energy of Chemical Reactions

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Chemical reactions are classified based on the type of energy (heat) change involved.

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Exothermic Reactions

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In exothermic reactions, energy is released.

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Endothermic Reactions

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In endothermic reactions, energy is absorbed.

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Energy Absorbed in Reaction

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The energy taken in during an endothermic reaction.

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Energy Released in Bond Making

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The energy released when new bonds are formed in the products.

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Products in Endothermic Reactions

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Substances formed after energy is absorbed and bonds are made.

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Energy in Products

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Lower than in reactants in endothermic reactions.

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Energy Diagram

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A graphical representation of energy changes during a reaction.