Exothermic and Endothermic Reactions

In an exothermic reaction, heat is ...

• taken in

• given out

Tags

NGSS.HS-PS1-4

If a chemical reaction is EXOTHERMIC, the temperature would....

• Stay the same

• Increase

• Decrease

Tags

NGSS.HS-PS1-4

What type of reaction is shown in the photo?

• Exothermic

• Isothermic

• Endothermic

• None of the  above

Tags

NGSS.HS-PS1-4

_____ reactions usually feel hot!

• endothermic

• exothermic

Tags

NGSS.HS-PS1-4

Some chemical reactions are ​ (a)   where the heat energy is absorbed. Other chemical reactions release heat energy are known as ​ (b)   .​

• endothermic

• exothermic

• thermal

• geothermal

Tags

NGSS.HS-PS1-4

reactions absorb energy around it making the area feel 'colder.'

​ reactions release energy to the surrounding area making the area feel 'warmer.'

• Endothermic

• Exothermic

• Isothermic

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4

reactions absorb energy around it making the area feel 'colder.' reactions release energy to the surrounding area making the area feel 'warmer.'

• Endothermic

• Exothermic

• Isothermic

Tags

NGSS.HS-PS1-4

Hand warmers use ​ (a)   reactions to ​ (b)   the temperature of the surroundings to feel warm. Cold packs use ​ (c)   reactions to ​ (d)   the temperature of the surroundings to feel ​ (e)  

• exothermic

• increase

• endothermic

• decrease

• cold

• warm

• keep

• explosive

• long

Tags

NGSS.HS-PS1-4

reactions absorb energy around it making the area feel 'colder.' reactions release energy to the surrounding area making the area feel 'warmer.'

• Endothermic

• Exothermic

• Isothermic

Tags

NGSS.HS-PS1-4

Match the following:

• Energy is absorbed

  (Heat goes in)

• Endothermic Reaction

• A reaction that creates a new substance

• Exothermic Reaction

• Energy is released

  (Heat goes out)

• Chemical Reaction

Answer explanation

For exothermic, think exo = exit, so the heat or energy is exiting.

This happens with any flame or explosion.

For endothermic, think endo = in, so the heat or energy is going in.

This happens with any baking or cooking.

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1