GChemOChem - Gases, Kinetics, and Equilibrium

Question 1

Avg kinetic energy is directly proportional to __ of a gas

Answer 1

temperature

Question 2

a barometer is used to measure ____ pressure

Answer 2

atmospheric

Question 3

1 atm = ____ kPa

Answer 3

101

Question 4

STP

Answer 4

standard temperature and pressure=0C (273.15K) and 1atm

Question 5

1 mol of any ideal gas occupies a volume of ___L

Answer 5

22.2L

Question 6

how to convert C to K

Answer 6

Celcius + 271

Question 7

0 K = ___ K (absolute zero)

Answer 7

-273

Question 8

Partial pressure equation

Answer 8

P=(X)(Ptot)

Question 9

Gases only behave ideally at __ temp and ___ pressure

Answer 9

high temp and low pressure

Question 10

in the van der Waals equation a stands for ___ and b stands for ___

Answer 10

a is attraction (Intermolecular forces)
B=bulkiness (volume)

Question 11

reation rates are the change in ___ over ___

Answer 11

change in conc. over time

Question 12

the orders in the rate law must be determined ___ and cannot be determined from the stoichiometric coefficients

Answer 12

experimentally

Question 13

rate law equation

Answer 13

Rate=K[A]^m[B]^n

Question 14

a number to the power of 0 is equal to

Answer 14

1

Question 15

It is important to calculate the rate law and the rate constant of the reaction so make sure to be able to do this

Question 16

What does the rate constant tell you? What will a higher reactant mean?

Answer 16

roughly how fast the rxn goes. A higher rate constant means a faster reaction

Question 17

For zero order reactions, the plot is ___

Answer 17

linear

Question 18

For first order reactions, the linear plot is ____(concentration) vs time

Answer 18

ln

Question 19

For second order reactions the linear plot is 1/concentration vs time. The slope is ____

Answer 19

positive

Question 20

First order reaction linear plot has a ____ K

Answer 20

negative (slope is down)

Question 21

concentration over time is a ___ order reaction

Answer 21

zero

Question 22

ln(concentration) over time is a ___ order rxn

Answer 22

first

Question 23

1/conc over time is a __ order rxn

Answer 23

second

Question 24

The intermediate is first ___ and then ___

Answer 24

formed, used

Question 25

a catalyst is first ____ and then formed

Answer 25

used

Question 26

a homogenous catalyst is in the ___ phase

Answer 26

same

Question 27

unimolecular - one molecule

Answer 27

dissociates

Question 28

Bimolecular two molecules __

Answer 28

collide

Question 29

Termolecular is when three molecules collide and this is very ___

Answer 29

rare

Question 30

the only thing that changes the equilibrium constant is ___

Answer 30

temperature

Question 31

defn Kp

Answer 31

equilibrium constants for gas-phase species based on partial pressure

Question 32

Kc defn

Answer 32

equilibrium constants for aqueous-phase species or gase phase species based on conc.

Question 33

Ka/Kb defn

Answer 33

acid/base dissociation constants

Question 34

Kq defn

Answer 34

dissociation constant for the self-ionization of water

Question 35

Ksp defn

Answer 35

solubility product for solutes in solution

Question 36

what is the equilibrium equation

Answer 36

Kc=products/reactants

Question 37

The reaction quotient, Q is an expression that combines all the instantaneous concentrations and is equivalent to ___. the only difference is that K (equilibrium constant) is ideal and Q is real

Answer 37

K

Question 38

when the volume increase, the pressure decreases and the shift in equilibrium is going to favour the ___ reaction because

Answer 38

reverse, it wants to make more moles of gas

Question 39

when the volume decreases, the pressure increases and the shift in equilibrium is going to favor the ___ reaction because

Answer 39

forward, get rid of excess moles of gases

Question 40

as you increase the H3O+ you ___ the pH

Answer 40

decrease

Question 41

k-rate constant
K-equilibrium constant

Answer 41

k-rate constant is found using the table
and we must know that it is the rate-limiting step (mechanism).
K-equil constant is Product/Reactant and to the power of the stoich

Question 42

what can change the equilibrium constant?

Answer 42

ONLY temperature

Question 43

divinding by 0.5 is the same as multiplying by __

Answer 43

2