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| Indicates the rate of disappearance of a reactant right after the reactancts are mixed. |
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| Indicated the rate of disappearance of a reactant over an extended period of time |
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| Indicates the rate of disappearance of a reactant at a specific time during the course of a reaction |
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| The proportionality constant in a rate equation |
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| Sum of the individual orders of the reactants |
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| An equation that expresses the reaction rate as a function of a reactant concentration, product concentrations and temperature |
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| Exponent on the concentration terms in a rate equation which define how the rate is affected by the reaction ocncentration |
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| The time required for a reactant's concentration to reach one-half of its initial concentration |
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| Minimum energy that molecules must have to react |
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| A collision in which the particles meet with sufficient energy and an orientation that allows them to react |
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| The term (A)in Arrhenius' equation and the product of the collision frequency (Z) and an orientation probability factor (p) that is specific for a reaction |
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Definition
| An unstable species formed in an effective collision of reactants that exists momentarily when the system is highest in energy and that can either form products or re-form reactants |
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| same as transition state: An unstable species formed in an effective collision of reactants that exists momentarily when the system is highest in energy and that can either form products or re-form reactants |
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Definition
| A graph that shows the potential energy of a reacting system as it progresses from reactants to products |
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Definition
| A series of steps in which a reaction occurs |
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| The number of reactant particles involved in an elementary step |
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| Rate Determining (limiting) Step |
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Definition
| The slowest step in a reaction mechanism and therefore the step that limits the overall rate |
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Definition
| A substance that increases the rate of a reaction by lowering the activation energy and without being used up in the process |
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| A catalyst (gas, liquid, or soluble solid) that exists in the same phase as the reactants |
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| A catalyst that occurs in a different phase from the reactants, usually a solid interacting with gaseous or liquid reactants |
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| A biological macromolecule (usually a protein) that acts as a catalyst and performs with spectacular efficiency and specificity |
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