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 property of water is a direct consequence of hydrogen bonding?
Answer: High surface tension
Hydrogen bonds pull surface molecules together, producing high surface tension.
Why is ice less dense than liquid water?
Answer: Hydrogen bonds form an open crystal lattice
Hydrogen bonding arranges water molecules into an open hexagonal lattice with more empty space.
A liquid with a high vapor pressure at room temperature most likely has:
Answer: Weak intermolecular forces
Weak intermolecular forces let molecules escape easily, raising vapor pressure.
Which substance is expected to have the highest boiling point?
Answer: C5H12 (pentane)
Pentane has the largest molar mass and most electrons, giving the strongest dispersion forces.
Capillary action of water in a thin glass tube results from:
Answer: Adhesion and cohesion
Adhesion to glass and cohesion among water molecules together drive capillary rise.
Compared to a branched isomer, a straight-chain alkane usually has a higher boiling point because it has:
Answer: Greater surface contact for dispersion forces
Straight chains contact each other over more surface area, strengthening London dispersion forces.
Water's high specific heat capacity is largely due to:
Answer: Energy needed to break hydrogen bonds
Much absorbed heat goes into disrupting hydrogen bonds rather than raising temperature.