Chem Ch. 9

Front 1

intermolecular forces

Back 1

forces that take place between molecules

Front 2

intramolecular forces

Back 2

stronger than intermolecular forces, takes place within moleculesdisperison

Front 3

dispersion

Back 3

instantaneous dipole that occurs accidentally in a given atom induces a similar dipolar in a neighboring atom

Front 4

Dipole-dipole

Back 4

molecules with polar bonds that attract each other electrostatically, force becomes weaker as distance increases

Front 5

H-bonding

Back 5

very strong dipole-dipole force that takes place when H is bonded to lone pairs on highly electronegative atoms like N, O, or F

Front 6

dispersion examples

Back 6

noble gases, nonpolar molecules, single atoms (CO2, N2, Cl2, Ne)

Front 7

dipole-dipole example

Back 7

different electronegativities/polar molecules (HCl, CH3COOH)

Front 8

h-bonding example

Back 8

H with F, N, or O (NH3, H2O, CH3NH2)

Front 9

boiling point and IMF

Back 9

stronger IMF = higher boiling point

Front 10

freezing point and IMF

Back 10

stronger IMF = higher freezing point

Front 11

vapor pressure and IMF

Back 11

weaker IMF = higher vapor pressure

Front 12

surface tension

Back 12

the resistance of a liquid to an increase in its surface area (Higher IMF = higher ST)

Front 13

Viscosity

Back 13

measurement of a liquid’s resistance to flow (higher IMF + larger molecules = higher viscosity)

Front 14

capillary action

Back 14

in polar liquids, spontaneous rising of a liquid in a narrow tube utilizing adhesive and cohesive forces

Front 15

cohesive forces

Back 15

the intermolecular forces among the other (polar) molecules of the liquid

Front 16

adhesive forces

Back 16

force between liquid molecules and their container (occurs when container is made of a substance that has polar bonds)

Front 17

vapor pressure

Back 17

molecules in vapor phase collide with walls and create a pressure

Front 18

enthalpy/heat of vaporization

Back 18

energy required to vaporize 1 mole of a liquid at a pressure of 1 atm

Front 19

equilibrium

Back 19

point at which rate of condensation and rate of evaporation meet and become equal

Front 20

phase boundary

Back 20

lines on the phase diagram that divide the two phases on the line

Front 21

triple point

Back 21

temperature at which all three phases exist simultaneously

Front 22

critical point

Back 22

endpoint on the line where liquid and gas meet, critical temp and critical pressure meet