8P9.2 Exothermic and Endothermic Reactions

What is the main difference between exothermic and endothermic reactions?

• Exothermic reactions release heat, while endothermic reactions absorb heat.

• Exothermic reactions absorb heat, while endothermic reactions release heat.

• Both exothermic and endothermic reactions release heat.

• Both exothermic and endothermic reactions absorb heat.

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What does 'exo' in exothermic mean?

• Enter

• Exit

• Energy

• Heat

In what forms can an exothermic reaction release energy?

• Light and electricity

• Heat and light

• Light and sound

• Heat and sound

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How is the energy released in an exothermic reaction sometimes represented in a chemical equation?

• As a reactant

• As a coefficient

• As a product

• As a catalyst

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What does 'endo' in endothermic mean?

• Energy

• Heat

• To go in

• To go out

How is the energy absorbed in an endothermic reaction sometimes represented in a chemical equation?

• As a product

• As a reactant

• As a coefficient

• As a catalyst

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NGSS.HS-PS1-4

What is an example of an endothermic reaction?

• Burning wood

• Photosynthesis

• Combustion of gasoline

• Mixing an ice pack

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NGSS.HS-PS1-4

How can an endothermic reaction be thought of in terms of energy?

• As a circular reaction

• As a sideways reaction

• As an uphill reaction

• As a downhill reaction

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