Section 9.3- Intermolecular Forces: Forces between Molecules

Question 1

many properties of a substance result from forces between molecules called

Answer 1

intermolecular forces

Question 2

the type and strength of ____________________ help determine not only whether a substance is a gas, liquid, or solid at a given temperature, but also whether or not it will dissolve in water or other solvents

Answer 2

intermolecular forces

Question 3

only things that affect boiling points

Answer 3

1. molecular weight
2. intermolecular forces

Question 4

we can use the __________________ of a substance as a measure of the strength of intermolecular forces

Answer 4

boiling point

Question 5

intermolecular forces may be divided into three categories

Answer 5

1. dipole-dipole forces
2. London forces,
3. hydrogen bonds

Question 6

intermolecular forces present ONLY BETWEEN POLAR MOLECULES

Answer 6

dipole-dipole forces

Question 7

intermolecular forces that affect EVERY TYPE OF MOLECULE

Answer 7

London forces

Question 8

intermolecular forces that are present ONLY BETWEEN MOLECULES CONTAINING CERTAIN TYPES OF POLAR BONDS

Answer 8

hydrogen bonds

Question 9

the forces between neighboring polar molecules due to the attractions of oppositely charged ends are

present in all polar molecules

Answer 9

dipole-dipole forces

Question 10

since dipole have only partial charges rather than the full charges found in predominantly ionic compounds, _______________ are not nearly as strong as ____________

Answer 10

dipole-dipole forces
ionic bond

Question 11

Fritz London explained that even ____________ experience a very weak attractive force when interacting with each other

Answer 11

nonpolar molecules

Question 12

intermolecular forces that affect all molecules and atoms, polar and nonpolar

Answer 12

London forces

Question 13

London forces are the only type of intermolecular force that affects

Answer 13

nonpolar molecules

Question 14

because they are a result of the way in which the electron cloud is distributed, London forces are also known as

Answer 14

dispersion forces

Question 15

may be defined as weak intermolecular forces resulting from instantaneous dipoles in molecules

Answer 15

London forces

Question 16

the more easily an electron cloud is distorted is a property known as

Answer 16

polarizability

Question 17

the more easily an electron cloud is distorted the _______________ the strength of the London forces

Answer 17

GREATER

Question 18

boiling points for similar compounds tend to ________________ with molar mass

Answer 18

INCREASE

Question 19

hydrogen atom bonds covalently to a strongly electronegative atom such as

Answer 19

oxygen, nitrogen, or fluorine

Question 20

the unusually strong intermolecular force between molecules containing hydrogen covalently bonded to a highly electronegative atom is a

Answer 20

hydrogen bond

Question 21

hydrogen bonds are much stronger than

Answer 21

other intermolecular forces