lesson 1

Question 1

in the solid and liquid states particles are closer together

Answer 1

condensed phase

Question 2

Attractive force between molecules; responsible for keeping matter in solid or liquid phase

Answer 2

intermolecular attraction

Question 3

bonding electrons shared equally between two atoms.

Answer 3

non polar covalent bond

Question 4

bonding electrons shared unequally between two atoms.

Answer 4

polar covalent bond

Question 5

result from the formation of temporary dipoles

Answer 5

dispersion forces

Question 6

attractions between an instantaneous dipoles

Answer 6

dispersion forces

Question 7

This forces are present in _________, whether they are polar or nonpolar

Answer 7

all molecules

Question 8

the tendency of an electron cloud to distort in this way is called

Answer 8

polarizability

Question 9

molecules that have permanent dipoles

Answer 9

dipole-dipole interactions

Question 10

molecules are close to each other

Answer 10

dipole-dipole interactions

Question 11

the ______ the molecule, the higher is its ______

Answer 11

more polar, boiling point

Question 12

the dipole-dipole interactions experienced when H is bonded to N, O, or F are unusually strong

Answer 12

Hydrogen bonding

Question 13

The strength of these forces are what make it possible for ionic substances to dissolve in polar solvents

Answer 13

ion-dipole

Question 14

3 elements in hydrogen bond

Answer 14

Nitrogen, Oxygen, Flourine

Question 15

results from the net inward force experienced by the molecules on the surface of a liquid

Answer 15

surface tension

Question 16

ressitance of a liquid

Answer 16

viscosity

Question 17

related to the ease with which molecules can move past each other

Answer 17

viscosity

Question 18

increases with stronger intermolecular forces and decreases with higher temperature

Answer 18

viscosity

Question 19

an attraction bet. unlike molecules

Answer 19

adhesion

Question 20

intermolecular attraction bet. like molecules

Answer 20

cohesion

Question 21

broader term that includes evaporation and also boiling

Answer 21

vaporization

Question 22

gaseous state of a substance which is normally a liquid or solid at room temperature

Answer 22

vapor

Question 23

substances that evaporate readily

Answer 23

volatile substances

Question 24

at any temperature, some molecules in a liquid have enough energy to escape

Answer 24

vapor pressure

Question 25

as the temperature rises, some molecules that have enough energy to escape

Answer 25

vapor pressure

Question 26

temperature at which its vapor pressure is equals atmospheric pressure

Answer 26

boiling point

Question 27

the normal boiling point is the temperature at which its vapor pressure is _____

Answer 27

760 torr