Endothermic & Exothermic Reactions

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs heat from its surroundings, resulting in a decrease in temperature.

Front

What is an exothermic reaction?

Back

An exothermic reaction is a chemical reaction that releases heat to its surroundings, resulting in an increase in temperature.

Front

Give an example of an endothermic process.

Back

Dissolving ammonium nitrate in water is an example of an endothermic process.

Front

Give an example of an exothermic process.

Back

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

Front

What happens to temperature in an endothermic reaction?

Back

The temperature of the surroundings decreases as heat is absorbed.

Front

What happens to temperature in an exothermic reaction?

Back

The temperature of the surroundings increases as heat is released.

Front

What is the role of heat in an endothermic reaction?

Back

Heat is taken in from the surroundings to facilitate the reaction.

Front

What is the role of heat in an exothermic reaction?

Back

Heat is given out to the surroundings as a byproduct of the reaction.

Front

What type of reaction occurs in photosynthesis?

Back

Photosynthesis is an endothermic reaction because it absorbs sunlight (energy) to convert carbon dioxide and water into glucose and oxygen.

Front

What type of reaction occurs in cellular respiration?

Back

Cellular respiration is an exothermic reaction because it releases energy by breaking down glucose in the presence of oxygen.