AP Chemistry Unit 8

When calculating ΔH from chemical equations with known enthalpies, if you double reaction coefficients, what happens to the overall ΔH value?

• it doubles

• it is squared

• the sign changes

• nothing

If the pressure of a system is increased, which direction will equilibrium shift?

• toward the side with less moles of gas

• toward the side with more moles of gas

• it will not shift

What order is the half life of Carbon¹⁴?

• Zero

• First

• Second

Tags

NGSS.HS-PS1-8

How does a catalyst speed up a reaction?

• Adding more reactant

• Providing a pathway that has a lower activation energy

• Increasing the activation energy

• Increasing binding energy

Match the following properties with their classification as either an intensive or extensive property.

• Temperature at which an object changes from solid to liquid

• Melting point

• Amount of matter in an object

• Silver

• Color of an object

• Metallic

• Appearance of an object

• Mass

At what time does the system first reach equilibrium?

• 24s

• 40s

• 60s

• 80s

Tags

NGSS.HS-PS1-5

When an electron is in a higher energy level, it is farther away from the nucleus and has less Coulombic attraction to the nucleus and is therefore easier to remove

• True

• False

Tags

NGSS.HS-PS2-4

Cations (+) are smaller than their atoms since you are removing valence electrons that are farther from the nucleus and anions (−) are larger than their atoms since adding extra electrons increases electron-electron repulsions.

• True

• False

Tags

NGSS.HS-PS1-1

The greater the electronegativity difference between 2 atoms, the more polar the bond becomes.

• True

• False

Molar Mass = dRT/P

• True

• False