Endothermic and Exothermic Reactions

Front

What is an exothermic reaction?

Back

An exothermic reaction is a chemical reaction that releases energy, usually in the form of heat, to its surroundings.

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs energy from its surroundings, usually in the form of heat.

Front

Give an example of an exothermic reaction.

Back

Burning wood is an example of an exothermic reaction, as it releases heat and light.

Front

Give an example of an endothermic reaction.

Back

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

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

True or False: Exothermic reactions absorb energy.

Back

False. Exothermic reactions release energy.

Front

True or False: Endothermic reactions feel cold to the touch.

Back

True. Endothermic reactions absorb heat, making them feel cold.

Front

What is a common characteristic of exothermic reactions?

Back

Exothermic reactions often produce heat, light, or sound.

Front

What is a common characteristic of endothermic reactions?

Back

Endothermic reactions often require a continuous input of energy to proceed.