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Flashcards for Chapter 16 in Chemistry
Flashcards for Chapter 16 in Mrs. Jackson's Chemistry Class
22
Chemistry
10th Grade
04/11/2012

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Term
Activated complex
Definition
short lived unstable arrangement of atoms that can break apart and re-form the reactants or can form products; also sometimes referred to as the transition state
Term
What is activation energy?
Definition
the minimum amount of energy required in order to form the activated coplex and lead to a reaction
Term
What is the collision theory?
Definition
atoms, ions, and molecules must collide in order to react
Term
What is the reaction rate?
Definition
the change in concentration of a reactant or product per unit of timee
Term
What is a catalyst?
Definition
something that speeds up the reaction rate but isn't used up in the reaction
Term
What is a heterogeneous catalyst?
Definition
catalyst that exists in a different physical state than the reaction
Term
What is a homogeneous catalyst?
Definition
catalyst that exists in the same physical state as the reaction
Term
What is an inhibitor?
Definition
something that slows down or stops the reaction
Term
What is the Method of Initial Rates?
Definition
determines reaction order by comparing the initial rates of a reaction carried out with varying reactant concentrations
Term
What is a Rate law?
Definition
expresses the relationship between the rate of a chemical reaction and the concentration of the reactants
Term
What is the reaction order?
Definition
defines how the rate is affected by the concentration of the reactant
Term
What is the Specific Rate Constant?
Definition
a numerical value that relates the reaction rate and the concentrations of reactants at a given temperature
Term
What is the complex reaction?
Definition
a reaction that has 2 or more elementary reactions that make it up
Term
What is an instantaneous rate?
Definition
rate of change in concentration as it relates to one specific point in time on the graph
Term
What is the intermediate?
Definition
substance that is produced in one elementary step and consumed in a subsequent elementary step
Term
What is the rate determining step?
Definition
slowest elementary step in a coplex reaction
Term
What is the reaction mechanism?
Definition
complete sequence of elementary steps that mek up a complex reaction
Term
What are the units for a reaction rate?
Definition
moles/Liters x second
Term
What is the unit for a constant?
Definition
1/seconds
Term
What isthe unit for a concentration?
Definition
moles/Liters or M
Term
What order is the concentration in if the initial rate doubles?
Definition
the first order
Term
What thing on the graph does instantaneous rate equal?
Definition
the slope
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