Chemistry: Intermolecular Forces & Properties Flashcards
7 cards from real AP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Chemistry: Intermolecular Forces & Properties flashcards as text
Which intermolecular force is responsible for the unusually high boiling point of water compared to H2S?
Answer: Hydrogen bonding
Water's O-H bonds enable strong hydrogen bonding, which H2S lacks because sulfur is less electronegative.
Which molecule exhibits ONLY London dispersion forces?
Answer: CH4
CH4 is nonpolar, so only temporary dipole London dispersion forces operate.
As molar mass increases among nonpolar molecules, London dispersion forces generally:
Answer: Increase
Larger molecules have more electrons and greater polarizability, strengthening dispersion forces.
Which pair of molecules can form hydrogen bonds with each other?
Answer: NH3 and H2O
Both NH3 and H2O have H bonded to N or O, allowing hydrogen bonding between them.
Dipole-dipole forces occur between molecules that are:
Answer: Polar
Permanent dipoles in polar molecules attract one another via dipole-dipole forces.
Which has the strongest intermolecular forces at room temperature?
Answer: Liquid water
Water is liquid at room temperature due to strong hydrogen bonding, while the others are gases.
Ion-dipole forces are most important in which situation?
Answer: Dissolving NaCl in water
When NaCl dissolves, water dipoles surround Na+ and Cl- ions via ion-dipole attractions.