Intermolecular Forces

Question 1

Three types of intermolecular forces

Answer 1

Dipole dipole force, hydrogen bond, dispersion force

Question 2

Dipole dipole force

Answer 2

And intermolecular force, the attraction of a positive end of one polar molecule to the negative end of another polar molecule

Question 3

Hydrogen bond

Answer 3

A special dipole dipole forces involved in hydrogen and a highly electronegative element (fluorine, oxygen, or nitrogen)

Question 4

What is the strongest intermolecular force

Answer 4

Hydrogen bond

Question 5

Dispersion force

Answer 5

An electrostatic attraction that arises between Adams or molecules because of the presence of instantaneous and induce temporary dipoles

Question 6

Kinetic molecular theory for solids(5)

Answer 6

Always moving in vibrating, high density, little diffusion, expand when increased temperature, do not compress

Question 7

Two types of solids

Answer 7

Crystalline and amorphous

Question 8

Crystalline solid

Answer 8

I solid in which the particles of her in a regular repeating pattern

Question 9

Amorphous solid

Answer 9

A solid in which the particles occur in random positions with no orderly pattern, shape, or form or structure

Question 10

Crystalline substances

Answer 10

Have exact melting points because all the bonds are the same

Question 11

Amorphous substances

Answer 11

Gradually soften as they are heated

Question 12

Sublimation

Answer 12

A physical change from the solid directly to the gaseous state

Question 13

Desposition

Answer 13

Physical change from the gas directly to the solid

Question 14

Crystal lattice

Answer 14

I repeating three-dimensional pattern of positive and negative ions in a crystal

Question 15

Unit cell

Answer 15

The simplest unit of repetition in a crystal lattice, “building block”

Question 16

Polymorphous

Answer 16

Describes a substance (either an element or compound) that occurs in more than one crystalline form

Question 17

Allotropic

Answer 17

Describes an element that has more than one crystalline form

Question 18

types of crystalline solids(5)

Answer 18

Atomic, covalent molecular, covalent network, ionic crystals, metallic crystals

Question 19

Atomic

Answer 19

Frozen noble gases

Question 20

Covalent molecular

Answer 20

How together by hydrogen bonds, dipole, and dispersion forces

Question 21

Covalent network

Answer 21

Like giant molecules

Question 22

Ionic crystals

Answer 22

Repeating crystal lattice pattern

Question 23

Metallic crystals

Answer 23

Metallic bonding

Question 24

Kinetic description of liquids(4)

Answer 24

Touching, not locked in place, little expansion or compression, permeability

Question 25

Two affects of intermolecular attractions

Answer 25

Cohesion and adhesion

Question 26

Cohesion

Answer 26

Attraction between particles

Question 27

Adhesion

Answer 27

Attraction between particles and other substances

Question 28

Surface tension

Answer 28

The tightening of a surface of a liquid due to unbalanced intermolecular forces on the surface particles

Question 29

Surfactant

Answer 29

A substance which reduces the surface tension

Question 30

Viscosity(3)

Answer 30

The thickness of a liquid, the ability of a liquid to resist flow, decreases as temperature rises

Question 31

Meniscus

Answer 31

The curved upper surface of a column of liquid

Question 32

Capillary action

Answer 32

The movement of a liquid up a narrow tube caused by the attraction of the molecules of a glass tube to the molecules of a liquid

Question 33

Diffusibility

Answer 33

Drop of food coloring diffuses through out a glass of water

Question 34

Permeability

Answer 34

Spilled milk permeates through a paper towel

Question 35

Wetness

Answer 35

A liquid "wets" a surface if the attraction of the liquid to the surface is greater than the attraction of the liquid to itself

Question 36

Intermolecular forces

Answer 36

And electrostatic attraction between molecules; it is much weaker than the bonds that form within molecules

Question 37

Lattice energy

Answer 37

The energy released when gaseous particles form a crystal

Question 38

Vaporization

Answer 38

A physical change from a liquid to a vapor or gaseous state

Question 39

Evaporation

Answer 39

A physical change from liquid to gas that occurs at the surface of a liquid

Question 40

Vapor pressure

Answer 40

Due to evaporated molecules above a liquid

Question 41

Boiling

Answer 41

Rapid change from liquid to gas

Question 42

Boiling point

Answer 42

Temperature at which the vapor pressure equals the applied pressure

Question 43

Normal boiling point

Answer 43

The temperature at which the vapor pressure equals 760torr

Question 44

Distillation

Answer 44

The process of separating a mixture by boiling one substance, condensing it, and collecting the liquid

Question 45

Phase diagram

Answer 45

Shows pressure and temperature at which a substance is a solid, liquid, or gas

Question 46

Triple point

Answer 46

The pressure and temperature at which a substance coexists as a solid, liquid, and gas

Question 47

Critical temperature

Answer 47

The highest temperature at which a gas can be liquefied

Question 48

Critical pressure

Answer 48

The pressure that is required to liquefy a gas at its critical temperature