Unit 08, 09 and 10 Combined Quizizz

Exothermic reactions are reactions that

• release heat
• do not involve heat
• absorb heat
• take place instantaneously

Which of the following is an endothermic process?

• solid to gas
• liquid to solid
• solid to liquid
• gas to liquid

What kind of graph is this?

• endothermic
• exothermic

Which of the letters (A-D) represents activation energy?

• A
• B
• C
• D

Which of the letters (A-D) represents the potential energy of the reactants?

• A
• B
• C
• D

Which of the letters (A-D) represents the potential energy of the products?

• A
• B
• C
• D

What kind of reaction has a positive heat of reaction (ΔHr)?

• endothermic
• exothermic

Compared to the potential energy of the products, the potential energy of the reactants above is?

• greater than
• less than
• the same
• impossible to determine

What kind of reaction has a negative heat of reaction (ΔHr)?

• endothermic
• exothermic

What kind of reaction is this?

• endothermic

• exothermic