Endothermic & Exothermic Reactions

ΔH value in an endothermic reaction is a positive number.

• True
• False

• -200 KJ

• 200 KJ

• 400 KJ

• -300 KJ

How much activation energy is needed for this reaction?

• 300 KJ

• 500 KJ

• 400 KJ

• 100 KJ

Are the products or reactants of this reaction storing more energy in their chemical bonds?

• Both storing the same

• No way to tell

• Products

• Reactants

What type of reaction is this?

• Exothermic

• Endothermic

• Energy Producing

• No way to tell

What kind of equation is this: 2KI + MgCl₂ + 200KJ ----> 2KCl + MgI₂

• Endothermic

• Exothermic

In this equation, is more energy stored in the bonds of the reactants or products: NaCl + AgF +100KJ -----> NaF + AgCl

• Products

• Reactants

How can you tell this reaction is exothermic: MgO + CaS ----> CaO + MgS + 200 KJ

• Energy is written on the products side

• Energy is being released

• Less energy is stored on product side

• All of these tell me

What type of reaction occurs in a hand warmer

• exothermic
• endothermic

Exothermic reactions...

• Absorb energy
• Release energy
• Release Color
• Absorb Color