Endothermic and Exothermic Flashcard

Front

What is an exothermic reaction?

Back

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

Front

What is a sign that a chemical reaction has occurred?

Back

Bubbles of gas appearing is a sign that a chemical reaction has occurred.

Front

What happens to temperature during an exothermic reaction?

Back

The temperature of the surroundings increases during an exothermic reaction.

Front

What happens to temperature during an endothermic reaction?

Back

The temperature of the surroundings decreases during an endothermic reaction.

Front

What type of change occurs when water freezes to form ice?

Back

The freezing of water to form ice is a physical change.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

Front

Give an example of an exothermic reaction.

Back

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

Front

Give an example of an endothermic reaction.

Back

Photosynthesis in plants is an example of an endothermic reaction, as it absorbs sunlight to convert carbon dioxide and water into glucose.

Front

What is the term for a reaction that can proceed in both forward and reverse directions?

Back

A reversible reaction is one that can proceed in both forward and reverse directions.