Reaction Coordinate Diagram Practice Problems

The reaction between nitrogen and oxygen can be represented by the following equation:

Which of the following energy level diagrams represent the above reaction?

• 
• 
• 
• 

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 the difference in energy between reactants and products represent?

• Activation energy

• Enthalpy change

• Entropy change

• Gibbs free energy

Tags

NGSS.HS-PS3-1

What does a higher peak in a reaction coordinate diagram indicate about the reaction?

• It is faster

• It is slower

• It is at equilibrium

• It is spontaneous

Tags

NGSS.HS-PS1-4

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

• Products are at a higher energy level than reactants

• Reactants are at a higher energy level than products

• The activation energy is zero

• The curve is a straight line

Tags

NGSS.HS-PS1-4

In a reaction coordinate diagram, what does a catalyst do to the activation energy?

• Increases it

• Decreases it

• Eliminates it

• Has no effect

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

• It is the point of maximum energy

• It is the point of minimum energy

• It is the starting point

• It is the end point

Tags

NGSS.HS-PS1-4

How does the presence of an enzyme affect a reaction coordinate diagram?

• Lowers the activation energy

• Raises the activation energy

• Increases the energy of reactants

• Decreases the energy of products

What does the area under the curve in a reaction coordinate diagram represent?

• Total energy change

• Activation energy

• Reaction rate

• It has no specific meaning

Tags

NGSS.HS-PS1-4

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

• A single-step reaction

• A two-step reaction

• An equilibrium reaction

• A spontaneous reaction