chemistry test #3 ch. 12 review

Question 1

T or F: intermolecular forces are the attractive forces between atoms within a compound

Answer 1

false

Question 2

T or F: intermolecular forces determine if a substance is a solid, liquid, or gas at room temperature

Answer 2

true

Question 3

T or F: liquids can be easily compressed

Answer 3

false

Question 4

T or F: atoms in a solid are always arranged in a well-ordered pattern

Answer 4

false

Question 5

T or F: the strength of the surface tension is inversely related to the strength of the intermolecular forces

Answer 5

false

Question 6

T or F: liquids that are viscous flow more slowly than liquids that are not viscous

Answer 6

true

Question 7

Viscosity increases with increased intermolecular force because the molecules attract each other strongly which hinders the flow.

Answer 7

true

Question 8

Evaporation is decreased by increasing the intermolecular forces.

Answer 8

true

Question 9

Compounds with very high vapor pressures must have very minimal intermolecular forces.

Answer 9

true

Question 10

Evaporation is an endothermic process.

Answer 10

true

Question 11

Intermolecular forces hold atoms and molecules in place in a solid.

Answer 11

true

Question 12

All intermolecular forces are broken when a liquid vaporizes into a gas.

Answer 12

true

Question 13

Dipole-dipole forces are weaker than dispersion forces.

Answer 13

false

Question 14

Hydrogen bonding occurs whenever hydrogen is present.

Answer 14

false

Question 15

H2 boils at a higher temperature than He because H2 undergoes hydrogen bonding.

Answer 15

false

Question 16

The strongest forces between CH4 molecules are hydrogen bonds.

Answer 16

false

Question 17

H2NCH2CH2NH2 probably has a higher boiling point at 1.00 atm pressure than CH3CH2CH2NH2.

Answer 17

true

Question 18

Which probably has the lowest boiling point at 1.0 atm pressure? SiH4, PbH4, CH4, GeH4, SnH4

Answer 18

CH4

Question 19

Which of the following compounds has the highest boiling point? HBr, HF, CH4, NH3, H2O

Answer 19

H2O

Question 20

Arrange in order by decreasing boiling point: Cl2, I2, Hl

Answer 20

Hl, I2, Cl2

Question 21

What is the strongest intermolecular force in a liquid containing molecules with H-N bonds?

Answer 21

hydrogen bonds

Question 22

As a gaseous element condenses, the atoms become ________ and they have ________ attraction for 30) one another.

Answer 22

closer together, more

Question 23

What types of intermolecular forces exist between CH3OH and H2O?

Answer 23

dispersion forces, hydrogen bonding, and dipole-dipole

Question 24

Which state of matter has a high density and a definite volume?

Answer 24

both solids and liquids

Question 25

Gaseous water vapor can frost the windows of a car on a cold morning. This process of a gas changing directly into a solid is known as:

Answer 25

deposition

Question 26

Which intermolecular force is due to the formation of an instantaneous dipole?

Answer 26

dispersion forces

Question 27

Which molecule below has hydrogen bonding? HF, NH3, H2O, CH3OH, all the above

Answer 27

all the above

Question 28

Which substance below has dipole-dipole forces? CH4, CO2, H2S, F2, none of the above

Answer 28

H2S