Chemistry Equilibrium

What is the K_eq expression for this reaction?    2 NO_(g)  +  O_2(g) ⇌  2 NO_2(g)

• K_c = [NO₂]² / [NO]² [O₂]

• K_c =  [NO]² [O₂] / [NO₂]²

• K_c = [NO]² [O₂] [NO₂]²

• K_c = [NO₂]² / [NO]² +  [O₂]

What is dynamic equilibrium?

• The reaction goes forward

• The reaction goes backward

• The rate of forward and backward reaction is equal

• The equilibrium is dynamite

How does a catalyst affect the position of the equilibrium?

• It does not. It only increases the rate of reaction.

• Position of equilibrium will shift to the right.

• Position of equilibrium will shift to the left.

• The reaction would be slower.

What would be the effect of increasing the temperature to the equilibrium of an exothermic reaction?

• equilibrium shifts to the left

• equilibrium shifts to the right

• no change in position of equilibrium

What would be the effect of increasing the temperature to the equilibrium of an endothermic reaction?

• equilibrium shifts to the left

• equilibrium shifts to the right

• no change in position of equilibrium

When pressure is increased, the position of the equilibrium will shift to the side that has...

• less number of gaseous molecules

• more number of gaseous molecules

At what time the reaction reached equilibrium?

• t₁

• t₂

• t₃

• t₄

For the reaction...
SO₂ + O₂  <=>  SO₃
If the concentration of SO₂ is increased, the equilibrium position of the reaction will shift ___________.

• to the left

• to the right

• to the left and right 

• neither left nor right

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

For the reaction...
N₂  +  O₂  <=>  2NO
If  O₂ is removed, the  concentration of N₂ will _______.

• increase

• decrease

• remain the same

• double

Tags

NGSS.HS-PS1-5

For the reaction...
N_{2 (g)} +  3 H_2 (g) <=> 2 NH_{3 (g)}

If the pressure in the system is increased,  which substance(s) will increase in concentration?

• N₂  (as 2 mol gas  → 4 mol gas)

• H₂ (as 2 mol gas  → 4 mol gas)

• N₂ and H₂ (as 2 mol gas  → 4 mol gas)

• NH₃ (as 4 mol gas  → 2 mol gas)