chapter 11 imfs and states of matter

Question 1

4 types of imfs

Answer 1

ion dipole
dipole dipole
h boiindig
dispersions

Question 2

ion dipole

Answer 2

occurs between an ion and polar molecule. STRONGESTS OF THE IMFS

Question 3

dipole dipole

Answer 3

occur between molecules with a permanent dipole moment

Question 4

hydrogen bonding

Answer 4

is the strongest form of dipole dipole

occurs when H is bonded to N O or F. and can force to one of them too

Question 5

what specifically do the bonds in a hydrogen bond happen to?

Answer 5

takes place specifically with the bonds and their electrons

Question 6

h donor

Answer 6

the molecule that brings the hydrogen

Question 7

h acceptor

Answer 7

the molecule that imfs to the hydrogent

Question 8

imfs are _____ lived bonds

Answer 8

short

Question 9

penny water and isopropol alcohol imf example

Answer 9

the water on a penny will form a bubble because of the strong imfs the alcohol will definately not

Question 10

London dispersion forces

Answer 10

occur between non polar and non polar molecules

Question 11

every molecule has a form of

Answer 11

dispersions

Question 12

boiling point

Answer 12

the higher the imfs the higher the boiling point

Question 13

the vapor pressure

Answer 13

the lower the imfs the higher the vapor pressure

Question 14

what affects the strength of dispersion forces

Answer 14

1. distance between molecules
   2size of a molecule
2. shape of a molecule

Question 15

size trend with IMFs

Answer 15

as the size increases so do the electrons and consequently so does the polerizability

thus as size increases so does the dispersion forces

Question 16

shape trend with IMFs

Answer 16

the longer the chain of molecules is, the higher the dispersion forces are.

Question 17

distance trend with IMFs

Answer 17

as the distance increases between molecules. the strength drops exponentially

Question 18

heat of fusion

Answer 18

the change in enthalpy associated with melting and freezing

Question 19

heat of vaporization

Answer 19

the heat of vaporization associated with vaporization or condensation

Question 20

heat of sublimation

Answer 20

the heat associated with sublimation or deposition

Question 21

how to calculate the energy required for a change in temp

Answer 21

q = mcat

Question 22

how to calculate the energy required for a change of state

Answer 22

q = Number moles)(delta H for that specific phase

Question 23

how to read a heating curve

Answer 23

temp vs energy added
each increase in temp with an increase in energy is due to the changing of the temperature of a substance

each flat line on temp is due to the changing of phases

Question 24

Arrange the following in order of increasing boiling point: CH4, CH3CH3, CH3CH2Cl, CH3CH2OH.

Answer 24

CH4 has the smallest boiling point because it consists of only dispersion forces. It it followed by a longer chain hydrocarbon CH3CH3 which has more points of contact. From here CH3CH2Cl follows and is an example of a molecule with dispersion forces and dipole forces. It is only exceeded by CH3CH2OH because it includes all of the following and Hydrogen bonding.