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Chem-Module 14

Reaction Rate The rate of change of a product in a chemical reaction
In order to react, chemicals must ______ with one another so that their electrons can either be transferred or rearranged collide
Higher temperature increases chemical reaction rate because the reactant molecules (or atoms) move _______, increasing the chance for a collision. faster
Decreasing concentration __________ the chemical reaction rate because there are fewer reactant molecules (or atoms) to collide with one another. decreases
Increasing the surface area of a reactant ________ reaction rate because the molecules (or atoms) of the reactant can more easily mingle with the molecules (or atoms) of the other reactants. increases
Rate equation R=k[A]x[B]y
k= Rate constant
x+y= overall order of the chemical reaction
Sometimes, the rate of a chemical reaction will be ____________ by the concentration o one of its reactants. In this case, the exponent of the rate equation is ______ for that reactant. unaffected, zero
The reaction rate order for a chemical equation must be determined experimentally: they are _______ equal to the stoichiometric coefficients in the chemical equation. NOT
Chemical reactions never actually ______. They just keep getting slower and slower until they proceed imperceptibility slowly.Thus, for any chemical reaction, no matte how long you wait, there will always be some reactants left. finish
The temperature dependence of reaction rate is determined by the variation of the __________ with temperature rate constant
The rate of many chemical reaction _______ for every ____ C increase in temperature doubles, 10
_______ speed up the reaction rate without actually getting used up in the chemical reaction. Catalysts
Decreasing the activation energy of a reaction ________ its rate increases
Catalysts speed up reaction rates by _______ the activation energy of the reaction. lowering
Heterogeneous Catalysts Catalysts that are in a different phase than the reactants
Homogenous catalysts Catalysts that have the same phase as at least one of the reactants
Reaction mechanism A series of chemical equations that tells you the step-by-step process by which a chemical reaction occurs
Created by: akikoandpoog