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Chem Test 3 Stack

Chemical Kinetics

TermDefinition
Average Rate Change in concentration of a reactant or product divided by change in time
Instantaneous Rate Rate at a particular moment
Initial Rate Rate at the instant a reaction begins
Experimental Rate Law The dependence of the observed rate of a reaction on the concentrations of various species
Rate Constant k
Orders Power of the concentration of a specie
Overall Reaction Order Sum of all the orders
Half-life Time it takes for the concentration of a reacting species to fall to half its initial value
Elementary Step Direct collisions of atoms, ions, or molecules
Unimolecular One atom elementary step
Bimolecular Two atoms colliding in an elementary step
Termolecular Three molecules colliding in an elementary step
Mechanism A series of elementary steps that add to give the overall reaction
Principle of Detailed Balance At equilibrium, the rate of every elementary step in a reaction mechanism equals the rate of its reverse
Intermediates Cancelled out molecules
Chain Reaction A reaction involved in three steps
Initiation First step of Chain Reaction
Propagation Second Step of Chain Reaction (Conversion steps)
Termination Last step of Chain Reaction
Arrhenius Equation ln k = ln A - Ea/RT
Inhibitors Opposite effect of catalyst
Homogeneous Catalyst in same phase
Heterogeneous Catalyst in different phase
Created by: iceman15177