Rates & Potential Energy Diagrams

Which PE Diagram represents an endothermic reaction?

• A

• B

Tags

NGSS.HS-PS1-4

Which PE Diagram represents an exothermic reaction?

• A

• B

Tags

NGSS.HS-PS1-4

What is collision theory?

• Molecules must collide in the correct orientation with enough energy to bond.

• Molecules need enough energy to collide and react.

• Atoms constantly collide and react.

• The minimum energy needed for atoms to react

Tags

NGSS.HS-PS1-5

What is the purpose of a catalyst?

• Helps to slow down a reaction

• Raises the activation energy

• Lowers the activation energy

• Is consumed by the reaction

What factors can influence reaction rate? Choose all that apply.

• Temperature

• Concentration

• Surface Area

• Catalysts

Activation Energy is the (a)   energy needed for a reaction to ​ (b)   .

• minimum
• start
• maximum
• end

Organize these options into the right categories

Groups:

(a) Bonds Breaking

,

(b) Bonds Forming

• Increased PE

• Energy Released

• Exothermic

• Energy Absorbed

• -ΔH

• Reduced stability

• Decreased PE

• +ΔH

• Increased stability

• Endothermic

What letter represents the energy of the products?

• A
• B
• C
• D

Tags

NGSS.HS-PS1-4

What type of reaction is this?

• Endothermic
• Exothermic

Tags

NGSS.HS-PS1-4

What letter represents the activation energy?

• A
• B
• C
• D