Chapter 8:
States of matter
Section2:
Forces of attraction
Home work
■ Solve the homework in this document and upload it back , you have 48 hours to
solve after that the HW will be closed automatically !!
1. Why are dispersion forces weaker than dipole-dipole
forces?
Dispersion forces are between temporary dipoles. And dipole-dipole forces are between permanent
dipoles.
2. Use relative differences in
electronegativity to label the ends of the polar
molecules listed as partially positive or partially
negative.
a. HF
for example= H+ F-
b. HBr
H+ Br-
c. NO
N+ O-
b. CO
C+ O-
3. Decide which of the substances listed can form
hydrogen bonds.
a.
H2O
b.
H2O2
c.
HF
d.
NH3
All of them can form hydrogen bonds.
Done by sara fekri