Endothermic and Exothermic Reactions

Is this endothermic or exothermic?

• exothermic

• endothermic

Tags

NGSS.HS-PS1-4

Is this endothermic or exothermic?

• exothermic

• endothermic

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5

Is this endothermic or exothermic?

• exothermic

• endothermic

Tags

NGSS.HS-PS1-4

In order to break bonds between atoms...

• energy is absorbed

• energy is released

• energy stays the same

• energy is cancelled

Tags

NGSS.HS-PS1-4

What happens to energy when bonds form between atoms?

• energy is absorbed

• energy is released

• energy is replaced

• energy is lost

Tags

NGSS.HS-PS1-4

In an exothermic reaction, more energy is released when the products form than is required to break the bonds.

• True

• False

Tags

NGSS.HS-PS1-4

When solid sodium bicarbonate was added to citric acid solution (Lab: Energy In, Energy out), the temperature decreased from 22°C to 10°C. Which description accurately models what happened?

• reactants + energy --> products

• reactants --> products + energy

• reactants + products = energy

• reactants --> energy

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

Did you know this is how a glow stick works? Pretty cool stuff! What is the best evidence that this is an exothermic reaction?

• light and small amounts of heat are given off

• color change

• popping noise as the glass inside it breaks

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

What type of reaction is modeled?

• endothermic

• exothermic

• this model is incorrect

Tags

NGSS.HS-PS1-4

What type of reaction is modeled?

• endothermic

• exothermic

• this model is incorrect

Tags

NGSS.HS-PS1-4