Chapter 12: Kinetics Flashcards

(20 cards)

1
Q

rate of reaction

A

change in molar concentration of reactants or products per unit time

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2
Q

average rate

A

rate over a given time period

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3
Q

instantaneous rate

A

rate of reaction at a specific time

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4
Q

initial rate

A

rate at time, t = 0
beginning of the reaction

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5
Q

relative rate of reaction

A

rate of reaction in terms of the decomposition of reactants and formation of products

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6
Q

catalyst

A

increases the rate of reaction by lowering the activation energy

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7
Q

rate law

A

expresses the relationship between rate of reaction and concentrations of reactants

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8
Q

rate constant

A

specific for a particular reaction at a particular temperature
proportionality constant
higher when the rate is higher, lower when the rate is lower

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9
Q

overall reaction order

A

sum of the individual reaction orders

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10
Q

initial rate method

A

determining order of reaction via measuring rate at different initial reactant concentration

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11
Q

integrated rate laws

A

relates the concentrations of reactants and time

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12
Q

first order reaction

A

one molecule involved to reach transition state

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13
Q

second order reaction

A

two molecules involved to reach transition state

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14
Q

zero order reaction

A

has no effect on rate of reaction

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15
Q

half life

A

time taken for half of the initial concentration of a species to decompose

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16
Q

collision theory

A

collisions must occur with enough energy in the proper orientation in order to reach the transition state
the rate of reaction is directly proportional to the rate of reactant collisions

17
Q

activation energy

A

energy needed to reach the transition state

18
Q

Arrhenius equation

A

relates the activation energy to the rate constant

19
Q

reaction diagram

A

shows the progress of a reaction

20
Q

frequency factor

A

frequency of collisions
collisions of proper orientation