Endothermic and Exothermic Reactions

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs heat from its surroundings, resulting in a decrease in temperature.

Front

What is an exothermic reaction?

Back

An exothermic reaction is a chemical reaction that releases heat to its surroundings, resulting in an increase in temperature.

Front

True or false: Endothermic reactions absorb energy.

Back

True

Front

True or false: Exothermic reactions absorb energy.

Back

False

Front

What happens to the temperature during an endothermic reaction?

Back

The temperature decreases because the reaction absorbs heat.

Front

What happens to the temperature during an exothermic reaction?

Back

The temperature increases because the reaction releases heat.

Front

Give an example of an endothermic reaction.

Back

Photosynthesis is an example of an endothermic reaction, where plants absorb sunlight to convert carbon dioxide and water into glucose.

Front

Give an example of an exothermic reaction.

Back

Combustion of fuels, like burning wood or gasoline, is an example of an exothermic reaction.

Front

What is the role of energy in endothermic reactions?

Back

Energy is used to break chemical bonds that require a lot of energy to break.

Front

What is the role of energy in exothermic reactions?

Back

Energy is released when new chemical bonds are formed.