Endothermic vs. Exothermic Reactions

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs energy (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 energy (heat) to its surroundings, resulting in an increase in temperature.

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

Cellular respiration is an example of an exothermic reaction, where glucose is broken down to release energy.

Front

What happens to energy during an endothermic reaction?

Back

Energy is absorbed from the surroundings.

Front

What happens to energy during an exothermic reaction?

Back

Energy is released into the surroundings.

Front

What is the role of heat in endothermic reactions?

Back

Heat is absorbed to break chemical bonds.

Front

What is the role of heat in exothermic reactions?

Back

Heat is released as chemical bonds are formed.

Front

How does evaporation relate to endothermic reactions?

Back

Evaporation is an endothermic process where water absorbs heat to change from liquid to vapor.

Front

How does combustion relate to exothermic reactions?

Back

Combustion is an exothermic reaction where substances like wood or gasoline burn, releasing heat.