Exothermic and Endothermic Reactions

Front

What is an exothermic reaction?

Back

An exothermic reaction is a chemical reaction that releases heat to its surroundings.

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs heat from its surroundings.

Front

What happens to temperature during an exothermic reaction?

Back

The temperature of the surroundings increases because heat is released.

Front

What happens to temperature during an endothermic reaction?

Back

The temperature of the surroundings decreases because heat is absorbed.

Front

What is a chemical change?

Back

A chemical change is a process where one or more substances are transformed into new substances with different properties.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

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.

Front

What is the role of heat in an endothermic reaction?

Back

In an endothermic reaction, heat is taken in or absorbed from the surroundings.

Front

What is the role of heat in an exothermic reaction?

Back

In an exothermic reaction, heat is given out or released into the surroundings.