2.6 Chemical Equilibrium

What is the definition of equilibrium?

• A state of motion

• A state of balance

• A state of confusion

• A state of acceleration

What is the purpose of a catalyst in a chemical reaction?

• Stops the reaction

• Changes the reactants

• Slows down the reaction

• Speeds up the reaction

Tags

NGSS.HS-PS1-5

Why does changing the concentration affect the rate of reaction?

• Increases the activation energy

• Increases the number of collisions

• Reduces the rate of reaction

• Decreases the number of collisions

Tags

NGSS.HS-PS1-5

What is the main difference between an exothermic and endothermic reaction?

• Exothermic reactions absorb energy

• Both reactions absorb energy

• Endothermic reactions release energy

• Both reactions release energy

Tags

NGSS.HS-PS1-4

What happens in a reversible reaction?

• The reaction only moves in one direction

• The reaction can only occur once

• The products turn back into the reactants

• The reactants disappear

What is a closed system?

• A system that is not affected by external forces

• A system that is not affected by external forces

• A system that exchanges matter with its surroundings

• A system that exchanges matter with its surroundings

Tags

NGSS.HS-PS3-4

What does Le Chatelier's Principle state?

• A system at equilibrium will shift to relieve stress

• A system at equilibrium will not shift under any stress

• A system at equilibrium will speed up reactions

• A system at equilibrium will stop reacting

Tags

NGSS.HS-PS1-5

If the concentration of SO2 is increased in a reaction, which way will the equilibrium shift?

• To the left

• To the right

• It will not shift

• It will stop reacting

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

What happens to the equilibrium if heat is added to an exothermic reaction?

• Stops reacting

• No effect on equilibrium

• Shifts to the right

• Shifts to the left

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5

If the volume of the container is decreased in a reaction, what will happen to the equilibrium?

• No effect on equilibrium

• Stop reacting

• Shift to the left

• Shift to the right

Tags

NGSS.HS-PS1-6