Exothermic and Endothermic Reactions

Front

What is an exothermic reaction?

Back

An exothermic reaction is a chemical reaction that releases heat to the surroundings.

Front

What happens to temperature in an exothermic reaction?

Back

The temperature in the local environment increases.

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs heat from the surroundings.

Front

What happens to temperature in an endothermic reaction?

Back

The temperature in the local environment decreases.

Front

What is the difference between exothermic and endothermic reactions?

Back

Exothermic reactions release heat, while endothermic reactions absorb 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.

Front

What is an example of an exothermic reaction?

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Combustion of fuels, such as burning wood or gasoline.

Front

What is an example of an endothermic reaction?

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Photosynthesis, where plants absorb sunlight to convert carbon dioxide and water into glucose.

Front

How can you identify an endothermic reaction in a lab?

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You can identify an endothermic reaction by measuring a decrease in temperature during the reaction.