Equilibrium and LeChatelier's Principle

For an endothermic reaction, heat can be thought of as:

• a reactant
• a product
• either it has no effect
• neither it effects both sides equally.

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-PS1-6

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-PS1-6

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

• increase
• decrease
• remain the same
• double

Tags

NGSS.HS-PS1-6

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

• left
• right
• left and right
• neither left nor right

Tags

NGSS.HS-PS1-6

NGSS.HS-PS1-5

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

• increase
• decrease
• stay the same
• triple

Tags

NGSS.HS-PS1-6

For the reaction...
heat  +  N₂  +  O₂  <−>  2NO
If the heat is added to the chemical system, the equilibrium will shift _______.

• left
• right
• left and right
• neither left nor right

Tags

NGSS.HS-PS1-6

NGSS.HS-PS1-5

For the reaction...
heat  +  N₂  +  O₂  <−>  2NO
If the heat is removed to the chemical system, the equilibrium will shift _______.

• left
• right
• both left and right
• neither left nor right

Tags

NGSS.HS-PS1-4

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

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

• N₂
• H₂
• N₂ and H₂
• NH₃

Tags

NGSS.HS-PS1-6

Define chemical equilibrium.

• A reaction is reversible.
• The concentration of the reactants is equal to the concentration of the products.
• The rate of a forward reaction is equal to the rate of the reverse reaction.
• The reaction stops and no further change in concentration occurs.

Tags

NGSS.HS-PS1-6