Intermolecular Forces Flashcards
how many degrees between each bond in a tetrahedral
109.5
how many degrees between each bond in a pyramidal
107.8
How many degrees between each bond in a V-shape
104.4
What is more repulsive, a double bond or single bond
double bond
If a molecule has one double bond and two single bonds what are the angles between:
A) the double and single
B) the single and single
A) 121
B) 118
What is more repulsive, an electron pair or a single bond?
lone electron pair
What are some physical properties that molecular shape alters?
viscosity
hardness
MP/BP
solubility
Inter molecular forces are _______ times _______ than ionic/covalent bonding
10-100, weaker
In terms of vapour pressure, what do IM forces do?
decrease vapour pressure as increase in IM strength
What are the three types of IM forces
- Dipole-dipole
- Dispersion forces
- Hydrogen bonding
from strongest to weakest, list the IM forces
ionic>h-bonding>dipole-dipole>dispersion
How does dipole-dipole bonding work
When a molecule is polar, each dipole is attracted to the dipole on another molecule
How does Hydrogen bonding work?
type of dipole-dipole bonding where the hydrogen essentially becomes a proton. The hydrogen is attracted to a lone pair on another molecule
What 3 elements can hydrogen bonding occur with and under what circumstance
O,N,F and when there is a lone electron pair
How does dispersion/instantaneous dipole work?
occurs in non-polar substances
due to random electron locations
dipole only exists for a second
