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Flashcards in module 14 Deck (19)
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1

reaction rate

the rate of change of a product in a chemical reaction

2

reaction kinetics

the study of how fast a reaction proceeds

3

in order to react, chemicals must

collide with one another so that their electrons can either be transferred or rearranged

4

higher temp increases chemical reaction rate because

the reactant molecules (or atoms) move faster, increasing the chance for collision

5

decreasing concentration decreases the chemical reaction rate because

there are fewer reactant molecules (or atoms) to collide with one another

6

increasing the surface area of a reactant -- the reaction rate because the molecules (or atoms) of the reactant can :

more easily mingle with the molecules (or atoms0 of the other reactants

7

sometimes the rate of a chemical reaction will be.. In this case, the exponent of the rate equation is -- for that reactant

unaffected by the concentration of one of its reactants
Zero

8

the reaction rate orders for a chemical reaction must be determined

experimentally

9

the reaction rate orders for a chemical reaction are not equal to

the stoichiometric coefficients in the chemical equation

10

instantaneous rate

the rate calculated from the rate equation
at the instant the reactants have the concentration we used, the rate will be what we calculate

11

chemical reactions never actually

finish. Thus, for any chemical reaction, there will always be some reactants left

12

the temp dependence of reaction rate is determined by

the variation of the rate constant with temp. since the rate constant increases with increasing temp, the reaction rate does as well.

13

the rate of many chemical reactions doubles for every-- increase in temp

10 C

14

catalysts

speed up the reaction rate without getting used up in the chemical reaction

15

a catalyst speeds up a chemical reaction by

reducing the activation energy of that reaction

16

decreasing the activation energy of a reaction

increases its rate

17

heterogeneous catalysts

catalysts that are in a different phase than the reactants

18

homogeneous catalysts

catalysts that have the same phase as at least one of the reactants

19

reaction mechanism

a series of chemical equations that tells you the step-by-step process by which a chemical reaction occurs