Unit 2- Lesson 1: Chemical Bonds and Reactions

What is the activation energy?

• The energy of the products
• The energy of the reactants
• The minimum energy needed by the reactants to form the products.
• The energy lost in the reaction

Tags

NGSS.HS-PS1-4

What is the potential energy of the reactants?

• 10 kJ
• 45 kJ
• 103 kJ
• 58 kJ

Tags

NGSS.HS-PS1-4

What is the potential energy of the products?

• 10 kJ
• 45 kJ
• 103 kJ
• 58 kJ

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

What kind of reaction is this?

• Endothermic
• Exothermic
• Cannot be determined

Tags

NGSS.HS-PS1-4

What is the change in energy of this reaction?

• 35 kJ

• - 35 kJ

• - 58 kJ

• 58 kJ

Would the reverse reaction absorb or release heat?

• Absorb

• Release

Which letter corresponds to the activation energy of the forward reaction?

• A
• B
• C
• D

Tags

NGSS.HS-PS1-4

Which letter corresponds to the energy of the reactants?

• A
• B
• C
• D

Tags

NGSS.HS-PS1-4

An exothermic reaction...

• Absorbs heat
• Releases heat
• Both absorbs and releases heat
• Does nothing

Tags

NGSS.HS-PS1-4

In an endothermic reaction the system is releasing energy.

• True
• False

Tags

NGSS.HS-PS1-4