Unit 7 Equilibrium AP Chemistry

Which is the correct equilibrium constant expression for the following reaction? Fe₂O_3(s) + H_2(g) —> Fe_(s) + H₂O_(g)

• K = [H₂O]3 / [H₂]³

• K = [Fe₂O₃] [H₂]³ / [Fe]²[H₂O]³

• K = [Fe]²[H₂O]³ / [Fe_2O₃] [H₂]³

• K= [Fe] [H₂O] / [Fe₂O₃] [H₂]

• K = [H₂O] / [H₂]

Tags

NGSS.HS-PS1-6

A very high value for K indicates that

• reactants are favored.

• products are favored.

• equilibrium is reached slowly.

• equilibrium has been reached

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

Vapor pressure and volatility decrease as IMF’s increase.

• True

• False

Tags

NGSS.HS-PS1-3

Only (aq), (l), and (g) appear in an equilibrium expression.

• True

• False

A larger K means there are ______ products at equilibrium

• more

• less

Tags

NGSS.HS-PS1-6

What happens to K if a reaction is reversed?

• K

• K²

• 2K

• -K

If K<Q, then the reaction shifts to the _________

• left

• right

Catalysts and inert gases do not shift an equilibrium.

• True

• False

Tags

NGSS.HS-PS1-6

When a molecular solid melts or boils, which breaks?

• Intermolecular forces

• Intramolecular bonds

Tags

NGSS.HS-PS3-4