IMF of Liquids (chapter 2)

Question 1

gas/ liquid; a substance that can flow

Answer 1

Fluid

Question 2

The measure of the elastic force in the surface of a liquid.

Answer 2

Surface tension

Question 3

The amount of energy required to stretch or increase in the surface of liquid by a unit area.

Answer 3

Surface tension

Question 4

Tendency of a liquid to rise in narrow tubes or to be drawn to small openings.

Answer 4

Capillary action

Question 5

The measure of a fluid’s resistance to flow.

Answer 5

Viscosity

Question 6

A gaseous substance that exist naturally as a liquid/ solid at normal temperature.

Answer 6

Vapor

Question 7

Change of phase from liquid to vapor (gaseous phase).

Answer 7

Vaporization

Question 8

The equilibrium pressure of a vapor above its liquid; that is, the pressure exerted by the vapor above the surface of the liquid in a closed container.

Answer 8

Vapor pressure

Question 9

The temperature at which a liquid boils

Answer 9

Boiling point

Question 10

Normal boiling point in atm?

Answer 10

1 atm

Question 11

The energy (kilojoules) required to vaporize 1 mole of a liquid at a given temperature.

Answer 11

Molar heat of vaporization (Hvap)

Question 12

It is manifested as some sort of skin on the surface of a liquid or in a drop of liquid.

Answer 12

Surface tension

Question 13

Molecules in liquid are pulled in?

Answer 13

All directions; downwards or sideways

Question 14

IMF causes liquid surface to

Answer 14

tighten like an elastic film/ skin

Question 15

in ST liquid; high IMF equals?

Answer 15

high surface tension

Question 16

Capillary action is also known as?

Answer 16

“Capillarity”

Question 17

Result of IM attraction between solid and liquid materials.

Answer 17

Capillary action

Question 18

Capillary action is shown in?

Answer 18

Water rising in capillary tubes

Question 19

CA 2 Types of Forces

Answer 19

Cohesion and Adhesion

Question 20

IM attraction between like molecules

Answer 20

Cohesion

Question 21

IM attraction between unlike molecules

Answer 21

Adhesion

Question 22

Cohesive forces > Adhesive forces

Answer 22

Surface is convex; ex. mercury

Question 23

Cohesive forces < Adhesive fores

Answer 23

Surface is concave; ex. water in glass

Question 24

Cohesive forces = Adhesive forces

Answer 24

Surface is horizontal; ex. distilled water

Question 25

High viscosity equals?

Answer 25

High time of liquid to flow

Question 26

Viscosity unit

Answer 26

Units of centipose

Question 27

Water's viscosity

Answer 27

1 centipose/ 0.001 Pa/s at 20°C

Question 28

Examples of lower viscosity

Answer 28

Carbon tetrachloride and benzene

Question 29

Resistance to flow is 1000x stronger than water

Answer 29

Glycerol

Question 30

is a metric system unit

Answer 30

Poise/ stoke

Question 31

SI unit of Viscosity

Answer 31

Pascal-second (Pa/s) or Newton-second/meter

Question 32

What makes glycerol's IMF stronger than water?

Answer 32

its larger number of -OH groups allows it to form more H bonds w/ other glycerol

Question 33

V in liquids; high IMF

Answer 33

high viscosity

Question 34

V in liquids; high temperature

Answer 34

low viscosity

Question 35

closed container

Answer 35

Vapor pressure

Question 36

greater # of gaseous particles equals

Answer 36

greater pressure

Question 37

equilibrium; closed container

Answer 37

Vapor pressure

Question 38

Pressure of gas is ___ proportional to # of gas present.

Answer 38

directly

Question 39

High temperature = ___ molecules escaping

Answer 39

high

Question 40

High VP = ___ temperature

Answer 40

high

Question 41

Examples (of lower vapor pressure)

Answer 41

ethyl alcohol and water

Question 42

Why does ethyl alcohol and water have lower VP?

Answer 42

bc both is in hydrogen bonding

Question 43

Polar but doesn't have H bonding

Answer 43

Acetone

Question 44

Nonpolar and has higher VP compared to ethyl alcohol and water

Answer 44

Pentane

Question 45

VP in liquids; high IMF

Answer 45

low vapor pressure

Question 46

move in random directions

Answer 46

gas molecules

Question 47

collide with other molecules

Answer 47

gas molecules

Question 48

rate of condensation is equal to?

Answer 48

rate of evaporation

Question 49

when condensation is equal to evaporation

Answer 49

equilibrium with liquid

Question 50

Relationship of vapor pressure and boiling point is ___ with other

Answer 50

consistent

Question 51

2 Properties of Liquids

Answer 51

1. Enthalpy/ molar heat of vaporization | 2. Boiling point of the liquid

Question 52

energy required to vaporize 1 mole of a liquid at a given temperature

Answer 52

enthalpy/ molar hear of vaporizarization

Question 53

symbol for enthalpy

Answer 53

"H"

Question 54

heat content at a given standard condition

Answer 54

enthalpy

Question 55

may be considered as a measure of the strength of IMF in a liquid

Answer 55

heat of vaporization

Question 56

easier to vaporize than H2O

Answer 56

acetone

Question 57

Why is acetone easier to vaporize than H2O?

Answer 57

bc acetone has no H bonding and heat in KE is enough to vaporize then

Question 58

Temperature at which the liquid converts into gas

Answer 58

boiling point

Question 59

liquid boils when

Answer 59

VP = pressure acting on the surface of the liquid.

Question 60

VP is equal to

Answer 60

external pressure

Question 61

normal boiling point

Answer 61

1 atm/ 100°C

Question 62

High enthalpy/ molar heat of vaporization

Answer 62

high boiling point

Question 63

good solvent (1)

Answer 63

water

Question 64

Has the ability to dissolve a large amount of chemical substance.

Answer 64

water

Question 65

Water is also known as?

Answer 65

"universal solvent"

Question 66

bc of water, H2O plans absorb?

Answer 66

nutrient ions

Question 67

water issues? (2)

Answer 67

farming and industrial plants

Question 68

Water has high?

Answer 68

Specific heat

Question 69

Amount of heat/ energy needed to raise the temperature of 1g of a substance by 10°C

Answer 69

Specific heat

Question 70

Specific heat of water?

Answer 70

1 calorie/g-°C (4.18J/g-°C)

Question 71

has one of the highest specific heat

Answer 71

water

Question 72

to raise the temperature of water...

Answer 72

IM hydrogen bonds should break

Question 73

Water's boilng point is? (3)

Answer 73

Unusually high

Question 74

Solid water is? (4)

Answer 74

less dense causing it to float.