Reaction Coordinate Diagram Practice Problems

Energy level diagram for endothermic reaction

• •The energy of the products is higher than the energy of the reactants.

• •The energy of the products is lower than the energy of the reactants.

Tags

NGSS.HS-PS1-4

Which part of a reaction coordinate diagram represents the activation energy?

• The peak of the curve

• The starting point of the curve

• The end point of the curve

• The area under the curve

In a reaction coordinate diagram, what does a higher peak indicate?

• Higher activation energy

• Lower activation energy

• Faster reaction rate

• Lower energy of products

What does the difference in energy between reactants and products represent in a reaction coordinate diagram?

• Activation energy

• Reaction rate

• Enthalpy change

• Catalyst effect

How does a catalyst affect a reaction coordinate diagram?

• Lowers the activation energy

• Increases the energy of reactants

• Increases the energy of products

• Does not affect the diagram

Tags

NGSS.HS-PS3-1

In an exothermic reaction, how does the energy of the products compare to the reactants in a reaction coordinate diagram?

• Lower than reactants

• Higher than reactants

• Equal to reactants

• Unrelated to reactants

What does a reaction coordinate diagram illustrate?

• Energy changes during a reaction

• Molecular structure

• Reaction speed

• Chemical equilibrium

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

Which of the following is true for an endothermic reaction in a reaction coordinate diagram?

• Products have higher energy than reactants

• Products have lower energy than reactants

• Energy of products and reactants is equal

• Energy of reactants is zero

Tags

NGSS.HS-PS1-4

What is the significance of the transition state in a reaction coordinate diagram?

• It represents the highest energy point

• It is the starting point of the reaction

• It is the end point of the reaction

• It represents the lowest energy point

How can you identify a spontaneous reaction in a reaction coordinate diagram?

• Products are at a lower energy level than reactants

• Products are at a higher energy level than reactants

• The peak is very high

• The curve is flat