Endothermic vs. Exothermic Reactions

After pouring cement for a project, the surrounding area feels warmer than it did before. What type of process would this represent?

• Exothermic

• Endothermic

Tags

NGSS.HS-PS3-4

If you touched the outside of a beaker after an endothermic reaction is carried out in the beaker, the beaker would feel _______  to the touch.

• warm

• cold

• the same

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

The law of conservation of energy states that

• energy can be created or destroyed

• energy cannot be created or destroyed

• energy can be potential or kinetic only

• heat energy is kinetic energy

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-3

In an endothermic reaction, heat is ...

• taken in or absorbed
• given out or released 

Tags

NGSS.HS-PS1-4

Do the reactants in an exothermic reaction have a higher or lower energy than the products?

• Higher
• Lower

Tags

NGSS.HS-PS1-4

What is true of this reaction?

• Equal amounts of energy were released and absorbed
• The reaction released more energy than it absorbed
• The reaction absorbed more energy than it released

Tags

NGSS.HS-PS1-4

Energy is released during the process of cellular respiration. This is an example of an ___________ reaction.

• endothermic

• exothermic

Tags

NGSS.HS-LS1-7

What kind of reaction is this?

• Endothermic
• Exothermic
• Cannot be determined

Tags

NGSS.HS-PS1-4

Line 1 represents a reaction without a catalyst. Line 2 represents a reaction with the addition of a catalysts. What is the difference between the 2 reactions shown here?

• Reaction 1 will happen faster.

• Reaction 2 will happen faster.

• Reaction 1 releases more energy.

• Reaction 2 releases more energy.

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5

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? (hint: the thermometer is part of the surroundings)

• It is an exothermic reaction

• It is an endothermic reaction

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5

NGSS.HS-PS3-4