PE Diagrams, & Exothermic vs. Endothermic

What is the PE of the reactants?

• 40 kJ
• 20 kJ
• 100 kJ
• 60 kJ

What is the activation energy?

• 40 kJ
• 20 kJ
• 100 kJ
• 60 kJ

What is the change of the heat of the reaction (ΔH)?

• 40 kJ

• -20 kJ

• 100 kJ

• 20 kJ

Is the reaction endothermic or exothermic?

• Endothermic
• Exothermic
• Caroussothermic
• Nonthermic

Which number represents the activated COMPLEX?

• 1
• 2
• 3
• 4

C represents

• enthalpy
• energy absorbed
• activation energy of the reverse reaction
• potential energy of the activated complex

What letter represents the activation energy of the forward reaction?

• A
• B
• C
• D

What is the sign of ΔH for all endothermic reactions?

• Positive
• Negative

What is the change of the heat of the reaction (ΔH)?

• -40 kJ

• -20 kJ

• 100 kJ

• 60 kJ

In this reaction, is energy released or absorbed?

• released

• absorbed