CD - The Progress of Chemical Reactions.

Which principle describes how a system at equilibrium responds to a change in conditions?

• Newton's Law

• LeChatelier's Principle

• Boyle's Law

• Einstein's Theory

What does it mean when we say a chemical reaction is at equilibrium?

• It means the reaction is happening very slowly.

• It means the reaction has stopped completely.

• It means the forward and backward reactions are happening at the same time and rate.

• It means the reaction is going very fast.

If you increase the temperature of a system at equilibrium, what will happen?

• The system will shift to the left

• The system will shift to the right

• The system will remain unchanged

• The system will disappear

What happens if you increase the pressure of a system at equilibrium where the number of moles of gas on the reactant side is greater than the number of moles on the product side?

• The equilibrium will shift to the left

• The equilibrium will shift to the right

• The equilibrium will remain unchanged

• The equilibrium will evaporate