Second Test

Question 0

LCP-add product

Answer 0

Reaction should shift to consume product

Question 1

LCP- add reactant

Answer 1

Reaction should shift to consume some of the reactant

Question 2

LCP-decrease volume

Answer 2

Increases pressure of gasses, system will respond trying to reduce pressure, shift toward side with less moles.

Question 3

LCP- increase volume

Answer 3

Shift toward side with more moles

Question 4

LCP- increase pressure

Answer 4

(Like added inert gas) would cause no change

Question 5

LCP-increase temperature (endothermic

Answer 5

Increases the equilibrium constant K, shifts toward products (shift toward the endothermic reaction)

Question 6

LCP-increase temp (exothermic

Answer 6

K decreases, shift toward reactants (the endothermic pathway)

Question 7

Le Chatelier’s Principle

Answer 7

Start with a reaction at equilibrium. Stress the equilibrium. The reaction will return to equilibrium so as to offset the stress.

Question 8

What does boiling point depend on?

Answer 8

Applied pressure

Substance

Question 9

Vapor pressure is a ____.

Answer 9

Constant for a given liquid and temp

Question 10

Vapor pressure does not depend on…

Answer 10

Volume of the container

Question 11

What determines the rate of condensation?

Answer 11

The gas density (determined by pressure)

Question 12

What determines the rate of evaporation?

Answer 12

Temperature

Question 13

For every temperature there’s only one ____ that will allow the rates of condensation and evaporation to be equal.

Answer 13

Pressure

Question 14

For every pressure there’s only one ____ that will allow the rates of condensation and evaporation to be equal.

Answer 14

Temperature

Question 15

The boiling point of a substance occurs where the vapor pressure is equal to the…

Answer 15

Applied pressure (or atmospheric pressure)

Question 16

Higher rate of evaporation =

Answer 16

Vapor pressure is higher

Question 17

Higher vapor pressure =

Answer 17

Lower boiling point

Question 18

What causes a higher rate of evaporation?

Answer 18

Weaker IMFs

Question 19

Boiling point varies with the strength of ____ in the liquid

Answer 19

IMFs

Question 20

High BP means ____ IMFs

Answer 20

Strong

Question 21

Low BP means _____ IMFs

Answer 21

Weak

Question 22

Boiling point increases as we go _____ a group in the periodic table

Answer 22

Down

Question 23

Molecules without ____ have low boiling points

Answer 23

Dipoles

Question 24

An atom with more electrons and protons will have larger...

Answer 24

London dispersion forces

Question 25

Hydorgen bond IMFs occur when...

Answer 25

The lone pairs on one molecule attract the hydrogen on another molecule

Question 26

Hydrogen bonding causes ____ BP

Answer 26

High

Question 27

Dispersion forces are greater than dipole-dipole forces when....

Answer 27

The two molecules are very different sizes

Question 28

Dipole-dipole forces are greater than dispersion forces when...

Answer 28

The molecules are similar in size

Question 29

Vapor pressure of solution is ____ than Pvap of pure solvent

Answer 29

Lower

Question 30

Adding solute _____ Pvap

Answer 30

Decreases

Question 31

Adding solute to a solvent...

Answer 31

Lowers rate of evaporation, which lowers rate of condensation and lowers vapor pressure

Question 32

Adding solute ____ BP, by _____

Answer 32

Raises, lowering Pvap

Question 33

The more volatile component will be more present in....

Answer 33

The vapor phase

Question 34

Adding solute to pure solvent ____ the freezing point

Answer 34

Lowers

Question 35

Melting ____ affected by adding a solute to solution

Answer 35

Is not initially

Question 36

Rate of ____ is lowered when solute is added to solvent

Answer 36

Freezing

Question 37

Rate of melting is lowered to reach equilibrium with the lowered rate of freezing by...

Answer 37

Lowering temperature at which the liquid melts/freezes

Question 38

Q greater than K

Answer 38

shift toward reactants

Question 39

Q less than K

Answer 39

shift toward products

Question 40

Q=K

Answer 40

reaction at equilibrium

Question 41

Gas to Solid

Answer 41

Deposition

Question 42

Solid to Gas

Answer 42

Sublimation

Question 43

Solid to Liquid

Answer 43

Melting (fusion)

Question 44

Liquid to Solid

Answer 44

Freezing

Question 45

Liquid to Gas

Answer 45

Evaporation (Vaporization)

Question 46

Gas to Liquid

Answer 46

Condensation

Question 47

Exothermic phase changes

Answer 47

Condensation, Freezing, Deposition

Question 49

Endothermic phase changes

Answer 49

Evaporation, Melting, Sublimation

Question 50

Henry's Law

Answer 50

At a constant temperature, the amount of a given gas that dissolves in a given type and volume of liquid is directly proportional to the partial pressure of that gas in equilibrium with that liquid.