Chemical Reactions: Endothermic and Exothermic

Equal amounts of four different substances (A-D) where added separately to equal amounts of an acid and a thermometer placed in the mixture. For which substance is the reaction the most exothermic?

Tags

NGSS.HS-PS3-4

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

Is photosenthysis an Exothermic or an Endothermic reaction?

• Endothermic

• Exothermic

Tags

NGSS.HS-LS1-5

NGSS.HS-PS1-4

What type of reaction occurs in a hand warmer?

• exothermic

• endothermic

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

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

• exothermic    

•  activated  

• decomposition            

• endothermic

Tags

NGSS.HS-PS3-4

• endothermic reaction

• exothermic reaction

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

In an exothermic reaction, heat is ...

• taken in

• given out

Tags

NGSS.HS-PS1-4

Which of these processes is always exothermic?

• evaporation

• burning

• insulation

• melting