Exothermic and Endothermic Reactions

Front

What is an exothermic reaction?

Back

An exothermic reaction is a chemical reaction that releases heat energy to the surroundings.

Tags

NGSS.HS-PS1-4

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs heat energy from the surroundings.

Tags

NGSS.HS-PS1-4

Front

What happens to temperature during an exothermic reaction?

Back

The temperature of the surroundings increases because heat is released.

Tags

NGSS.HS-PS1-5

NGSS.HS-PS3-4

Front

What happens to temperature during an endothermic reaction?

Back

The temperature of the surroundings decreases because heat is absorbed.

Tags

NGSS.HS-PS3-4

Front

Give an example of an exothermic reaction.

Back

Combustion of fuels, such as burning wood or gasoline.

Tags

NGSS.HS-PS1-4

Front

Give an example of an endothermic reaction.

Back

Photosynthesis, where plants absorb sunlight to convert carbon dioxide and water into glucose.

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

Front

What is the main characteristic of exothermic reactions?

Back

They usually feel hot to the touch.

Front

What is the main characteristic of endothermic reactions?

Back

They usually feel cold to the touch.

Tags

NGSS.HS-PS3-1

Front

In an exothermic reaction, heat is...

Back

given out.

Tags

NGSS.HS-PS1-4

Front

In an endothermic reaction, heat is...

Back

taken in.

Tags

NGSS.HS-PS1-4