Energy changes Foundation

In an exothermic reaction, heat is ...

• taken in
• given out

Tags

NGSS.HS-PS1-4

What type of reaction is shown?

• Exothermic

• Endothermic

In an endothermic reaction, heat is ,,,

• taken in
• given out

Tags

NGSS.HS-PS1-4

Which letter corresponds to the energy of the reactants?

• A
• B
• C
• D

What type of reaction occurs in a hand warmer?

• exothermic

• endothermic

What sort of reaction is this?

• Exothermic

• Endothermic

Is the combustion of petrol endothermic or exothermic?

• Endothermic

• Exothermic

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-PS1-4

NGSS.HS-PS3-4

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? 

• The temperature changed 
• It is an endothermic reaction
• It is an exothermic reaction 
• Two of the answers are correct 

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

Which letter corresponds to the activation energy?

• A

• B

• C

• D