Intermolecular Forces Wkst
Chemistry
1)
2)
3)
4)
Name:
Date:
Period:
Using your knowledge of molecular
structure, identify the main intermolecular
force in the following compounds. You
may find it useful to draw Lewis structures
to find your answer.
a)
PF3
b)
H2CO
c)
HF
What is the strongest intermolecular force present
for each of the following compounds?
Explain how dipole-dipole forces cause
molecules to be attracted to one another.
Rank the following compounds from
lowest to highest boiling point: calcium
carbonate, methane, methanol (CH4O),
dimethyl ether (CH3OCH3).
13)
water
14)
carbon tetrachloride
15)
ammonia
16)
carbon dioxide
17)
phosphorus trichloride
18)
nitrogen
19)
ethane (C2H6)
20)
acetone (CH2O)
21)
methanol (CH3OH)
22)
borane (BH3)
23)
For each of the following compounds
indicate which intermolecular force is
most important:
Explain why nonpolar molecules usually
have much lower surface tension than
polar ones.
For each of the following compounds, determine the
main intermolecular force. You may find it useful to
draw Lewis structures for some of these molecules:
5)
nitrogen
6)
carbon tetrachloride
7)
H2S
8)
sulfur monoxide
9)
N2H2
10)
boron trihydride
11)
CH4O
12)
SiH2O
a)
FCN
b)
HCN
c)
C2H6
d)
CF2H2
24)
Explain why ethyl alcohol (C2H5OH) has a
higher boiling point (78.40 C) than methyl
alcohol (CH3OH; 64.70 C).
25)
Rank the following by from lowest to
highest anticipated boiling point: C2H4,
CH4, Ne, H3COCH3
26)
Motor oil largely consists of molecules
that consist of long chains of carbon
atoms with hydrogen atoms attached to
them. Using your knowledge of
intermolecular forces, why wouldn’t it be
better to use a compound like glycerol.
The formula of glycerol is CHOH(CH2OH)2.