Reaction Rates and Equilibrium Essay

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activated complex
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a temporary arrangement of interacting chemical species that is an intermediate between reactants and products
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transition state
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the state of a system (or of the individual species) between reactants and product 
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activation energy
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the energy barrier that must be overcome for a reaction to occur
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catalyst   (KA-tl-uhst)
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a substance present during a chemical reaction that speeds up the reaction but is not used up or changed during the reaction
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inhibitor
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a physical or chemical component of a system that prevents the free interaction of reactant molecules
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transition state
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the state of a system (or of the individual species) between reactants and product
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collision theory
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a body of scientific evidence supporting the statement that chemical reactions and reaction rates are based on the physical interactions of molecules in motion.
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reversible reaction
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a reaction in which there is a dynamic equilibrium between products and reactants
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chemical equilibrium
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the process by which the reactants form products and products form reactants at equal rates
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equilibrium constant
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the ratio between the concentrations of the products and the concentrations of the reactants
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Le Chatelier’s principle
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factors such as changes in pressure or concentration will affect the equilibrium of a system in predictable ways
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spontaneous reaction
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a reaction that will process without (much) outside influence and that will result in a relatively substantial amount of product
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Gibbs free energy
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the energy that is released during a spontaneous reaction that is available to do work
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entropy ; (EN-truh-pee)
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the randomness of any physical system

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