Equilibrium and Changing conditions

What causes pressure?

• Gas molecules hitting off the inside of the container

• Liquid molecules interacting with each other

• The attraction between ions in a solid

• Solute particles reacting with a solvent

How will the position of equilibrium move if the concentration of SO₃ is decreased when at equilibrium?

SO₂ + O₂ ⇌ SO₃

• It will move in the reverse direction to make more SO₂ and O₂

• It will move in the forward direction to make more SO₃

• It will not move at all

• It will move in the reverse direction to use up SO₃

For the reaction below, how will the pressure change if the forward reaction occurs? Choose two boxes to explain your answer

N₂ + 3H₂ ⇌ 2NH₃

• It will increase because....

• It will decrease because......

• the forward reaction goes from 2 molecules to 4 molecules

• the forward reaction goes from 4 molecules to 2 molecules

The forward reaction is exothermic (heat producing) and the reverse is endothermic (heat absorbing). How will the position of equilibrium move if the temperature for the reaction is increased?

N₂ + 3H₂ ⇌ 2NH₃

• The equilibrium will move forward to increase the temperature

• The equilibrium will move reverse to increase the temperature

• The equilibrium will not move forward or reverse

• The equilibrium will move in the reverse to decrease the temperature

When pressure is increased in a reaction, the equilibrium always moves to the...

• forward direction

• side with the most molecules

• side with the least number of molecules

• reverse direction