Chemical Reactions :Endothermic vs. Exothermic

Front

What is an exothermic reaction?

Back

An exothermic reaction is a chemical reaction that releases energy in the form of heat or light.

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

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 main difference between exothermic and endothermic reactions?

Back

The main difference is that exothermic reactions release energy, while endothermic reactions absorb energy.

Front

What is combustion?

Back

Combustion is a chemical reaction that occurs when a substance reacts rapidly with oxygen, producing heat and light.

Front

What is a molecule?

Back

A molecule is made up of one or more atoms bonded together.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is the role of energy in chemical reactions?

Back

Energy is involved in breaking and forming bonds during chemical reactions, influencing whether the reaction is exothermic or endothermic.

Front

What happens to temperature in an exothermic reaction?

Back

In an exothermic reaction, the temperature of the surroundings increases as heat is released.