Evaporation Rate
Various Compounds
The data below shows the change in
temperature when 4 different compounds
are exposed to room temperature air for
over 2 minutes.
Compound Temperature
Change (C)
A
B
"C
-12.5
-9.2
-7.6
-4.8
D
Type of IMF
DF
DF
DF, DD
DF, DD, HB
DF-dispersion forces, DD-dipole-dipole,
HB-hydrogen bonding
What is the likely cause for the
difference in evaporation
points of the compounds A
and D?
A. The atoms have different types of bonds
holding the molecule together.
B. The molecules have different amounts of
dispersion forces.
C. The molecules have different numbers of
oxygen atoms.
D. The molecules have different
intermolecular forces.
