AP Chemistry Thou Shall Not

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

Real gases behave most like an ideal gas at high temperature and at low pressure. The more polar a gas is and the larger a gas is, the more it will deviate from ideal behavior. Consequently, small, nonpolar gases are the _______ ideal.

• Most

• Least

ΔH; feels hot; heat is a product; temperature goes up

• Exothermic

• Endothermic

Tags

NGSS.HS-PS1-4

What is the study of matter and how it changes?

• Biology

• Physics

• Chemistry

• Geology

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-4

NGSS.HS-PS1-5

The Periodic Table of Elements is most related to...

• Chemistry

• Geology

• Astronomy

• Biology

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

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

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

• the sign for ΔH changes

• it doubles

• it is squared

• nothing

Which of these is false in terms of speeding up reactions?

• Adding a catalyst lowers the activation energy

• increasing reactant concentration increases collisions

• increasing surface area decreases collisions

• increasing temperature increases collisions

Tags

NGSS.HS-PS1-5

What happens to K if a reaction is reversed?

• K

• K²

• 2K

• -K