Endothermic and Exothermic Reactions

Front

What is an exothermic reaction?

Back

An exothermic reaction is a chemical reaction that releases energy in the form of 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 energy from its surroundings, resulting in a decrease in temperature.

Front

Give an example of an exothermic reaction.

Back

An example of an exothermic reaction is the combustion of fuels, such as burning wood or gasoline.

Front

Give an example of an endothermic reaction.

Back

An example of an endothermic reaction is photosynthesis, where plants absorb sunlight to convert carbon dioxide and water into glucose.

Front

What happens to temperature during an exothermic reaction?

Back

The temperature increases during an exothermic reaction.

Front

What happens to temperature during an endothermic reaction?

Back

The temperature decreases during an endothermic reaction.

Front

What type of reaction occurs in a hand warmer?

Back

Exothermic reaction.

Front

What is the main characteristic of exothermic reactions?

Back

Exothermic reactions usually feel hot to the touch.

Front

What is the main characteristic of endothermic reactions?

Back

Endothermic reactions usually feel cold to the touch.

Front

What is the role of energy in chemical reactions?

Back

Energy is either absorbed or released during chemical reactions, determining whether the reaction is endothermic or exothermic.