9/29/2009
Chemistry 20 Unit A –
Bonding UA pt B:
Intermolecular Forces
Name: __________
Date: __________
1.
State the intermolecular forces in each of the following groups of molecules and
then number them from highest to lowest boiling points. The following abbrivations are
allowed: Ionic = I, Dipole-Dipole = DD, London Dispersion = LD, Hydrogen Bonding =
HB (2 marks each)
a.
Cl
H
\
/
C═C
/
\
H
H
b.
CH4
c.
C6H5OH
C6H5F
d.
H2O
HF
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H H
O
│ │
║
H ─ C ─ C ═ C ─ C ─ OH
│
│
H
H
C2H6
CH3Cl
CH3OCH3
C6H5CH3
9/29/2009
e.
CO2
SiO2
f.
CH3CH3, CH3NH2 , CH3OH, CH3F
g.
CH3OCH3 , CH3CH2OH, CH4
2.
Identify the types of intramolecular or intermolecular bonds in the following. You
may use the abbreviations from the first question. (0.5 marks each)
a.
argon _____________________
f.
Al ___________________
b.
water _____________________
g.
CaCl2 ________________
c.
methane __________________
h.
KClO3 _______________
d.
carbon monoxide ___________
i.
NaCl _________________
e.
SiC ______________________
j.
HCN _________________
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9/29/2009
3.
Predict the order of increasing melting points of these substances containing
chlorine. Explain the basis for your prediction. (2 marks)
HCl
4.
Cl2
NaCl
CCl4
Arrange from highest to lowest boiling point. (2 marks)
LiF, H2O, H2CNH, HCN, CsCl, Co, C, C3H8, PH3, F2, SCl2
5. You are also responsible for reading the following in the textbook: Nelson pages 119129. Define the following terms and concepts: (0.5 marks each)
Crystal lattice: ……………………………………………………………………...............
………………………………………………………………………………………………
Metallic crystal: ……………………………………………………………………………
………………………………………………………………………………………………
Molecular crystal: …………………….……………………………………………………
………………………………………………………………………………………………
Covalent network crystal: ……………………….…………………………………………
………………………………………………………………………………………………
The 4 covalent networks of Carbon: ……….………………………………………………
………………………………………………………………………………………………
Semiconductors: ……………………………………………………………………………
………………………………………………………………………………………………
Bonus Questions: Answer only ONE!!!
Fair Bonus Question: Define the term allotrope.
Unfair Bonus Question: Write yours or someone you love’s name using only chemical symbols for elements.
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Intermolecular Forces Assignment