Polarity and IMF

Question 1

Intermolecular forces:

Answer 1

between molecules

Question 2

Intramolecular forces:

Answer 2

covalent bonds btwn atoms

Question 3

Which one is stringer inter or intramolecular forces?

Answer 3

Intra

Question 4

Molecular polarity:

Answer 4

polar bonds are formed when there is an unequal sharing of e- btwn atoms

Question 5

Molecular polarity of molecules influences the…

Answer 5

forces btwn molecules

Question 6

Why is it important to know the polarity of a molecule?

Answer 6

properties of subtances (boiling point and solubility) are affected by the forces btwn the molecules of a substance

Question 7

Dipoles:

Answer 7

polar molecules

Question 8

Dipole moment:

Answer 8

arrow used to show the direction of polarity and points towards more electronegative atom (tail crossed on the more + end)

Question 9

Nonpolar molecules do not…

Answer 9

create poles bc equal sharing of e-

Question 10

Polar molecules are :

Answer 10

asymmetrical

Question 11

Nonpolar molecules are;

Answer 11

symmetrical

Question 12

In a nonpolar molecule the forces….

Answer 12

cancel out and net dipole moment is zero

Question 13

Molecular polarity depends on:

Answer 13

-polarity of the bonds
-the shape of the molecule

Question 14

Determining molecular polarity:

Answer 14

• draw lewis structure of molecule
• determine polarity of the bonds

Question 15

two or more lines of symmetry in molecule=

Answer 15

nonpolar

Question 16

zero or one line of symmetry=

Answer 16

polar

Question 17

Molecular polarity is determined by:

Answer 17

shape and distribution of charge in the molecule

Question 18

SNAP:

Answer 18

Aymmetrical Nonpolar Asymmetrical Polar

Question 19

If atoms in the molecule are symmetrical=

Answer 19

charges are balanced by each other (nonpolar)

Question 20

Intermolecular forces together are called:

Answer 20

Van der Waals Forces

Question 21

Van der Waals Forces:

Answer 21

-London Dispersion Forces
-Dipole-Dipole Force
-Hydrogen Bond

Question 22

The boiling point of a liquid is determine by the…

Answer 22

strength of its intermolecular forces

Question 23

Stronger intermolecular forces=

Answer 23

higher boiling point

Question 24

Intermolecular forces vary in strength and are weaker than

Answer 24

covalent intramolecular forces

Question 25

Intermolecular forces : weakest to strongest

Answer 25

London Dispersion Forces
Dipole-Dipole force
Hydrogen Bond

Question 26

(London Dispersion Forces) E- are in

Answer 26

constant motion and distribution may be uneven

Question 27

(London Dispersion forces) uneven e- distribution creates a…

Answer 27

temporary + and - pole

Question 28

(london dispersion force) Temporary dipole can->

Answer 28

induce a dipole in a nearby atom

Question 29

London Dispersion forces:

Answer 29

intermolecular forces created by the constant motion of e- and temporary dipoles

Question 30

(london dispersion forces) Induced dipoles account for the fact that a nonpolar molecule like oxygen is able to ->

Answer 30

dissolve in water - a polar molecule

Question 31

Dipole-Dipole forces:

Answer 31

the force of attraction between polar molecules (dipole and dipole)

Question 32

Dipole-dipole forces are _____ than London Dispersion forces

Answer 32

stronger

Question 33

Hydrogen bond:

Answer 33

a special type of dipole- dipole force

Question 34

(hydrogen bond) Special type of dipole- dipole force occurs when:

Answer 34

hydrogen bonds with N,O, or F

Question 35

The strength of the hydrogen increases w/:

Answer 35

the degree of electronegativity of the atom bonded to it