AP Chemistry

Breaking bonds is endothermic. Forming bonds is exothermic.

• True

• False

Tags

NGSS.HS-PS1-4

A single bond is composed of

• 1 sigma bond

• 1 pi bond

• 1 sigma and 1 pi bond

• no sigma or pi bonds

A triple bond is composed of

• 1 sigma bond

• 1 pi bond

• 2 pi bonds

• 1 sigma and 2 pi bonds

Lattice energy is the energy to break an ionic bond in a compound. Lattice energy increases as the ion’s charge increases. Lattice energy decreases as the radii of the ions increase.

• True

• False

Tags

NGSS.HS-PS2-4

Which is the strongest IMF?

• LDF

• Dipole dipole

• Hydrogen bonding

• Ion-dipole

Tags

NGSS.HS-PS1-3

Which would have the strongest IMFs?

• CH₄

• C₂H₂

• C₄H₈

• C₈H₁₄

Vapor pressure and volatility decrease as IMF’s increase.

• True

• False

SiO2 (quartz) and diamonds are ____________________, and they have very high boiling/melting points.

• covalent network solids

• ionic solids

• molecular solids

• interstitial alloys

Which is not needed for a reaction to occur?

• particles must collide at the correct orientation

• particles must collide with a minimum energy

• particles must be large enough to break bonds

A first order reaction graph is

• ln[A] v time

• 1/[A] v time

• [A] v time

Tags

NGSS.HS-PS1-5