Endothermic and Exothermic Reactions

What is an Exothermic Reaction?

• An exothermic reaction absorbs energy.
• An exothermic reaction occurs only in gases.
• An exothermic reaction is a type of chemical equilibrium.
• An exothermic reaction is a reaction that releases energy.

Tags

NGSS.HS-PS1-4

What is an Endothermic Reaction?

• An endothermic reaction releases heat.
• An endothermic reaction occurs without any heat exchange.
• An endothermic reaction is a type of combustion reaction.
• An endothermic reaction is a reaction that absorbs heat.

Tags

NGSS.HS-PS1-4

6. Which of these processes is always exothermic?

• A. evaporation

• B. burning

• C. insulation

• D. melting

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NGSS.HS-PS1-4

During an endothermic reaction in a beaker if we are part of the surroundings and touched the beaker, it would feel _______. 

• Warm
• Cold

Tags

NGSS.HS-PS3-4

5. When ammonium chloride dissolves in water the temperature falls. The type of energy change is described as?

• A. exothermic    

•  B. activated  

• C. decomposition            

• D. endothermic

Tags

NGSS.HS-PS1-4

• endothermic

• exothermic

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NGSS.HS-PS1-4

• endothermic reaction

• exothermic reaction

Tags

NGSS.HS-PS1-4

NGSS.HS-LS1-5

5. When ammonium chloride dissolves in water the temperature falls. The type of energy change is described as?

• A. exothermic    

•  B. activated  

• C. decomposition            

• D. endothermic

Tags

NGSS.HS-PS1-4

A student mixed two chemicals to allow them to react. The temperature before the reaction was 25 ° C. The temperature after the reaction was 18° C. Which of the following is true?

• It is an exothermic reaction

• It is an endothermic reaction

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

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

• Stay the same
• Increase
• Decrease

Tags

NGSS.HS-PS1-4