Chemical Equilibrium Kp

Nitrogen and oxygen do not react appreciably at room temperature, as illustrated by our atmosphere. But at high temperatures, the reaction below can proceed to a measurable extent.

N₂(g) + O₂(g) ⇌ 2NO(g)

At 3000 K, the reaction above has K_c = 0.0153. If 0.3000 mol of pure NO is injected into an evacuated 2.000 L container and heated to 3000 K, what will be the equilibrium concentration of NO?

• 0.0096 mol dm^-3

• 0.0706 mol dm^-3

Tags

NGSS.HS-PS1-5

At a particular temperature, K_c = 2.0 x 10¯⁶ for the reaction:

2CO₂(g) ⇌ 2CO(g) + O₂(g)

If 2.0 mol CO₂ is initially placed into a 5.0 L vessel, calculate x?

• x = 4.3 x 10¯³ M

• x = 4.3 x 10^-2 M

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 revers 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... SO₂ + O₂  <−>  SO₃ If the concentration of SO₂ is increased, the equilibrium of the reaction will shift ___________.

• left

• right

• left and right 

• neither left nor right

Tags

NGSS.HS-PS1-5

For the reaction... SO₂ + O₂ <−>  SO₃ If the equilibrium shifts to the right, the concentration of O₂ will ___________.

• increase

• decrease

• remain the same

• double

Tags

NGSS.HS-PS1-5

Nitrogen and oxygen do not react appreciably at room temperature, as illustrated by our atmosphere. But at high temperatures, the reaction below can proceed to a measurable extent.

N₂(g) + O₂(g) ⇌ 2NO(g)

At 3000 K, the reaction above has K_c = 0.0153. If 0.3000 mol of pure NO is injected into an evacuated 2.000 L container and heated to 3000 K, what will be the equilibrium concentration of NO?

• 0.0096 mol dm^-3

• 0.0706 mol dm^-3

Tags

NGSS.HS-PS1-5

Nitrogen and oxygen do not react appreciably at room temperature, as illustrated by our atmosphere. But at high temperatures, the reaction below can proceed to a measurable extent.

N₂(g) + O₂(g) ⇌ 2NO(g)

At 3000 K, the reaction above has K_c = 0.0153. If 0.3000 mol of pure NO is injected into an evacuated 2.000 L container and heated to 3000 K, what will be the equilibrium concentration of NO?

• 0.0096 mol dm^-3

• 0.0706 mol dm^-3

Tags

NGSS.HS-PS1-5

At a particular temperature, K_c = 2.0 x 10¯⁶ for the reaction:

2CO₂(g) ⇌ 2CO(g) + O₂(g)

If 2.0 mol CO₂ is initially placed into a 5.0 L vessel, calculate x?

• x = 4.3 x 10¯³ M

• x = 4.3 x 10^-2 M

Tags

NGSS.HS-PS1-2

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

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

Tags

NGSS.HS-PS1-2

If the equilibrium constant is much greater than one (K >> 1) then

• Equilibrium is not established.
• Equilibrium lies to the right (products are favored)
• Equilibrium lies to the left (reactants are favored)
• Neither products or reactants are favored.