exam 1 part 2

Question 1

increasing the temp causes vapor pressure to what? (molecules)

Answer 1

increase bc more molecules are able to escape

Question 2

boiling point is

Answer 2

where vapor pressure equals atmospheric pressure

Question 3

normal boiling point

Answer 3

1 atm or 760 torr

Question 4

vapor pressure questions use what formula?

Answer 4

the one with ln(p2/p1)… where r = 8.3145

Question 5

surface tension

Answer 5

the energy required to break the surface (to increase surface area of liquid)

Question 6

surface tension increases with?

Answer 6

higher IMFs and lower temp

Question 7

raising the temp decreases surface area bc

Answer 7

kinetic energy increases to easier to break IMFs

Question 8

cohesive forces

Answer 8

(pull at surface liquid) attraction btw like molecules in a liquid

Question 9

adhesive forces

Answer 9

attraction btw liquid molecules and surface of the tube (pull surface liquid up the sides)

Question 10

cohesive forces are stronger in what U shape

Answer 10

convex upside down

Question 11

viscosity

Answer 11

a liquids resistance to flow

Question 12

what force creates an internal friction that reduces rate of flow?

Answer 12

cohesive forces

Question 13

greater viscosity =

Answer 13

stronger IMFs

Question 14

what makes higher viscosity?

Answer 14

larger molecular size/mass and lower temp

Question 15

more spherical, branched, shape makes

Answer 15

lower viscosity

Question 16

miscibility (mixability)

Answer 16

ability of liquids to dissolve into a homogeneous mixture (like dissolves like)

Question 17

combination of 2 polar compounds (or 2 nonpolar compounds)

Answer 17

miscible

Question 18

boiling point temperature of water

Answer 18

100 C