Question 10.3: Identifying Intermolecular Forces Identify the likely kinds ......
Identifying Intermolecular Forces
Identify the likely kinds of intermolecular forces in the following substances:
(a) HCl (b) CH_3CH_3 (c) CH_3NH_2 (d) Kr
STRATEGY
Look at the structure of each substance, and decide what intermolecular forces are present. All molecules have dispersion forces; polar molecules have dipole–dipole forces; and molecules with O-H, N-H, or F-H bonds have hydrogen bonds.
(a) HCl is a polar molecule but can’t form hydrogen bonds. It has dipole–dipole forces and dispersion forces.
(b) CH_3CH_3 is a nonpolar molecule and has only dispersion forces.
(c) CH_3NH_2 is a polar molecule that can form hydrogen bonds. In addition, it has dipole– dipole forces and dispersion forces.
(d) Kr is nonpolar and has only dispersion forces.