Chemical Kinetics

Front 1

Rate of Rxn depends on

Back 1

[Particles], temperature, structure, and orientation

Front 2

Rate=

Back 2

-[ΔA]/Δt

Front 3

As time increases reactant concentration ____

Back 3

Decreases

Front 4

As time increases product concentration ____

Back 4

Increases

Front 5

Rate law =

Back 5

Rate = k[A]^n

Front 6

Zero order

Back 6

The rate is independent of [A]

Front 7

First order

Back 7

The rate is directly proportional to the [A]

Front 8

Second order

Back 8

The rate is proportional to the square of the [A]

Front 9

Rate law for a reaction must be determined

Back 9

Experimentally

Front 10

First order: ln([A]t/[A]0) = -kt

Y=mx+b

Y=

m=

b=

Back 10

Y= ln[A]t

m= -kt

b= ln[A]0

Front 11

First order y axis

Slope =

Back 11

Y-axis = Ln[A]t

Slope = -k

Front 12

Second order: 1/[A]t - 1/[A]0 = kt

Y=mx+b

Y=

m=

b=

Back 12

Y= 1/[A]t

m= kt

b= 1/[A]0

Front 13

Second order y-axis

Slope

Back 13

Y-axis = 1/[A]t

Slope = +k

Front 14

Zero order y-axis

Slope =

Back 14

Y-axis = [A]

Slope = -k

Front 15

If the half life is constant ___ order rxn

Back 15

First

Front 16

If half life depends on initial concentration then ____ order rxn

Back 16

Second

Front 17

For second order: as concentration increases the half life _____

Back 17

Increases

Front 18

Zero order k units

Back 18

M • s-1

Front 19

First order k units

Back 19

s-1

Front 20

Second order k units

Back 20

M-1 • s-1

Front 21

What order?

Back 21

Second order plot

Front 22

What order

Back 22

First order plot

Front 23

What order?

Back 23

Zero order plot

Front 24

Order of half like expression?

Back 24

First order

Front 25

Order of half like expression?

Back 25

Second order

Front 26

Order of half like expression?

Back 26

Zero order

Front 27

A=

Back 27

Frequency factor / Collison factor

Front 28

Back 28

Activation energy

Front 29

Back 29

Activated complex / Transition state

Front 30

Back 30

ΔHrxn

Front 31

p=

z=

Back 31

p= orientation factor

z= collision frequency

Front 32

Collision frequency

Back 32

Number of collisions per unit of time

Front 33

Reaction mechanism

Back 33

Steps of a chemical reaction

Front 34

A → products

__molecular

Back 34

Uni

Front 35

A + A → products

__molecular

Back 35

Bi

Front 36

A + B → products

__molecular

Back 36

Bi

Front 37

A + B + C → product

__molecular

Back 37

Ter

Front 38

Rate determining step

Back 38

Slowest step

Front 39

Which is rate determining step?

Back 39

First / pink

Front 40

Catalyst

Back 40

Increases the rate of rxn

Not consumed by the rxn

Front 41

Homogenous catalyst

Back 41

Same phase of the reactants

Front 42

Heterogeneous catalyst

Back 42

Different phase than reactants

Front 43

Active site

Back 43

Specific area where just right to bind to the substrate

Front 44

Substrate

Back 44

Reactant molecule that fits into the active site like a key