Endothermic and Exothermic Reactions

Front

What is an exothermic reaction?

Back

An exothermic reaction is a chemical reaction that releases heat to the surroundings, causing the temperature of the surroundings to increase.

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs heat from the surroundings, causing the temperature of the surroundings to decrease.

Front

Give an example of an exothermic reaction.

Back

An example of an exothermic reaction is the rusting of iron, where heat is released.

Front

Give an example of an endothermic reaction.

Back

An example of an endothermic reaction is the melting of ice, where heat is absorbed.

Front

What happens to temperature in an exothermic reaction?

Back

In an exothermic reaction, the temperature of the surroundings increases.

Front

What happens to temperature in an endothermic reaction?

Back

In an endothermic reaction, the temperature of the surroundings decreases.

Front

What is the role of heat in exothermic reactions?

Back

In exothermic reactions, heat is released as a product of the reaction.

Front

What is the role of heat in endothermic reactions?

Back

In endothermic reactions, heat is absorbed as a reactant in the reaction.

Front

What is a common everyday example of an exothermic reaction?

Back

A common example is combustion, such as burning wood or gasoline.

Front

What is a common everyday example of an endothermic reaction?

Back

A common example is photosynthesis, where plants absorb sunlight to convert carbon dioxide and water into glucose.