Test 1- Chem 112- St. Thomas- Summer

Question 1

which are bonding forces?

Answer 1

intERmolecular

Question 2

when are london forces stronger?

Answer 2

larger molar mass,

Question 3

more imfs mean…

Answer 3

lower temp and closer to solid

Question 4

when does vapor pressure go up?

Answer 4

when temp goes up

Question 5

higher altitude means what for vapor pressure?

Answer 5

lower, so there is a lower boilng point

Question 6

pressure cooker

Answer 6

increased pressure, so increades temp, so food is cooking at higher temp

Question 7

vaporization, endo or exo

Answer 7

exo

Question 8

condensation, endo or exo

Answer 8

endo

Question 9

ion dipole

Answer 9

intER, high water soluability

Question 10

electrostatic force

Answer 10

inrRA, undissolvable

Question 11

more london forces means

Answer 11

more solubility

Question 12

gases: higher temp

Answer 12

decreased solubility

Question 13

colligative properties

Answer 13

depend on concentration, not chemical identity. vapor pressure, boiling point, freezing point, osmotic pressure

Question 14

molality

Answer 14

moles solute/kg solvent

Question 15

mole fraction

Answer 15

moles A/ total moles

Question 16

boiling

Answer 16

boiling when vapor pressure = atmospheric pressure

Question 17

osmotic pressure

Answer 17

faster solute to solvent

Question 18

what affects rate

Answer 18

chemical properties
physical state of reactants
temp
concentration of reactants
presence of catalyst

Question 19

graph: zero

Answer 19

decreasing left to right, slope = -k

Question 20

graph: first

Answer 20

decreasing left to right, slope = -k

Question 21

graph, second

Answer 21

increasing left to right, slope = k

Question 22

reaction intermediates

Answer 22

formed and used up during overall reaction

Question 23

elementry reactions

Answer 23

individual steps of reaction

Question 24

one molecule step

Answer 24

unimolecular

Question 25

two molecule step

Answer 25

bimolecular

Question 26

3 molecule step

Answer 26

termolecular

Question 27

rate determining step

Answer 27

slowest step

Question 28

catalyst

Answer 28

speed reactiion by decreasing activation energy

Question 29

less IMFs mean

Answer 29

higher temp and closer to gas

Question 30

conversions

Answer 30

1atm=760torr=760hgmm=14.7psi=101325pa=1.01325bar

Question 31

voltility

Answer 31

how well something turns into a vapor

Question 32

Less london dispersion force=

Answer 32

lower boiling point

Question 33

in phase transitions, does temp change?

Answer 33

NO

Question 34

water freezing point

Answer 34

0C

Question 35

strongest IMF between solvent and solute

Answer 35

ion-dipole