Le Châtelier's Principle

An exothermic reaction is allowed to reach equilibrium. If heat energy is then removed, the equilibrium will shift

• toward the middle
• toward the reactant side
• toward the product side

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

For the reaction...

heat + N_{2 (g)} + O_{2 (g)} <==> 2NO _(g)

If O_2(g) is removed, the concentration of N₂ will _______.

• increase

• decrease

• remain the same

• double

Tags

NGSS.HS-PS1-5

For the reaction...

2SO_{2 (g)} + O_{2 (g)} <==> 2SO_{3 (g)}

If the equilibrium shifts to the right, the concentration of O_2(g) will ___________.

• increase

• decrease

• remain the same

Tags

NGSS.HS-PS1-6

For the reaction...

N_{2 (g)} + 3 H_{2 (g)} <==> 2 NH_{3 (g)}

If the pressure in the system is increased, the reaction will __________________.

• shift to the left

• shift to the right

• not shift

For the following equilibrium reaction:

N_{2 (g)} + 3 H_{2 (g)} <==> 2 NH_{3 (g)}

Predict the direction that the reaction will proceed, or shift, if...

The volume of the container is increased.

• right

• left

• no effect

For the following equilibrium reaction:

N_{2 (g)} + 3 H_{2 (g)} <==> 2 NH_{3 (g)}

Predict the direction that the reaction will proceed, or shift, if...

N₂ is added

• right

• left

• no effect

Tags

NGSS.HS-PS1-5

For the following equilibrium reaction:

2SO_{2 (g)} + O_{2 (g)} <==> 2SO_{3 (g)}

Predict the direction that the reaction will proceed, or shift, if...

SO₂ is removed

• right

• left

• no effect

Tags

NGSS.HS-PS1-5

At what time (in seconds) is equilibrium established?

• 0 seconds

• 1 second

• 6 seconds

• 12 seconds

At what time does the reaction reach equilibrium?

• t₁
• t₂
• t₃
• t₄

Tags

NGSS.HS-PS1-6

If I add a chemical to a system at equilibrium, increasing its concentration,

• the reaction will shift to the same side of the equation where it appears to make more of it

• the reaction will shift to the opposite side of the equation where it appears to use some of it up

• the reaction will not shift

• byproducts (other unwanted chemicals) will be formed to use the excess

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6