Equilibrium 7.1-7.7 AP Chem CHHS Herbig

This symbol indicates that a reaction is ____________

• reversible
• irreversible

Tags

NGSS.HS-PS1-6

What are [A] and [B]?

• concentration of reactants
• concentration of products
• energy of reactants
• energy of products

Tags

NGSS.HS-PS1-6

NGSS.HS-PS1-5

What is the equilibrium expression for:
Fe₃O₄(s) + 4H₂(g) <--> 3Fe(s) + 4H₂O(g)

• ([Fe]³[H₂O]⁴ ) / ([Fe₃O₄][H₂]⁴)
• ([Fe₃O₄][H₂]⁴)/ ([Fe]³[H₂O]⁴)
• [H₂O]⁴ / [H₂]⁴
• ([Fe][H₂O]) / ([Fe₃O₄][H₂])

What is the value for the reaction N₂(g) + 2O₂(g) ↔ N₂O₄(g) in terms of the K values for the following reactions:

1/2 N₂(g) + 1/2 O₂(g) ↔ NO(g) K₁

2 NO(g) + O₂(g) ↔ N₂O₄(g) K₂

• K₁ + K₂

• K₁² + K₂

• 2 K₁ x K₂

• K₁² x K₂

The reaction 2 SO₂(g) + O₂(g) ↔ 2 SO₃(g) has an equilibrium constant of K₁. What is the K value for the reaction

SO₃(g) ↔ SO₂(g) + 1/2 O₂(g)?

• 1/2 K₁

• 1/K₁

• (1/K₁)^1/2

• K₁^1/2

Tags

NGSS.HS-PS1-6

If a reaction is reversible and has reached equilibrium, what can be said about the amounts of reactants and products?

• some reactant, some product
• no reactant, all product
• all reactant, no product

Tags

NGSS.HS-PS1-6

What are the two factors to look for when determining if the reaction is at equilibrium?

• Forward reaction rate is faster than the reverse and concentrations are equal

• Forward and reverse reaction rates are equal and concentration is constant

• Forward and reverse reaction rates are equal and concentration is equal

• Forward reaction rate is faster than the reverse and concentration is equal

Tags

NGSS.HS-PS1-6

For the reaction,

CO₂(g) + 4 H₂(g) ↔ CH₄(g) + 2 H₂O(g),

K = 8.2 x 10¹⁹ at 25°C.

Initially CO₂(g) and H₂(g) are 1.0 atm at 25°C in an evacuated container, which substance will have the highest pressure when the system is at equilibrium?

• CO₂(g)

• H₂(g)

• CH₄(g)

• H₂O(g)

2 SO₂(g) + O₂(g) ↔ 2 SO₃(g) When 0.40 mole of SO₂ and 0.60 mole of O₂ are placed in an evacuated 1.00-liter flask, the reaction represented above occurs. After the reactants and the product reach equilibrium and the initial temperature is restored, the flask is found to contain 0.30 mole of SO₃. Based on these results, the expression for the equilibrium constant, Kc, of the reaction is

• 
• 
• 
• 

Tags

NGSS.HS-PS1-6

NGSS.HS-PS1-7

At what time did the reaction reach equilibrium?

• t₁

• t₂

• t₃

• t₄