Exothermic and Endothermic Reactions

Front

What is an exothermic reaction?

Back

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

Front

What happens to temperature during an exothermic reaction?

Back

The temperature increases.

Front

What happens to temperature during an endothermic reaction?

Back

The temperature decreases.

Front

Give an example of an exothermic reaction.

Back

Combustion of fuels, such as burning wood or gasoline.

Front

Give an example of an endothermic reaction.

Back

Photosynthesis in plants, where they absorb sunlight.

Front

What is the role of calcium chloride in chemical reactions?

Back

Calcium chloride can be used in exothermic reactions to release heat.

Front

What is the role of citric acid in chemical reactions?

Back

Citric acid can be involved in endothermic reactions, absorbing heat.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances.