Endothermic and Exothermic Reactions

Front

What is an endothermic reaction?

Back

A chemical reaction that absorbs more energy than it releases, requiring energy input to proceed.

Front

What is an exothermic reaction?

Back

A chemical reaction that releases more energy when products form than is required to break the bonds of the reactants.

Front

What happens to energy in an endothermic reaction?

Back

Energy is absorbed from the surroundings.

Front

What happens to energy in an exothermic reaction?

Back

Energy is released into the surroundings.

Front

Give an example of an endothermic reaction.

Back

Photosynthesis, where plants absorb sunlight to convert carbon dioxide and water into glucose.

Front

Give an example of an exothermic reaction.

Back

Combustion of fuels, such as burning wood or gasoline, which releases heat and light.

Front

What is chemical potential energy?

Back

The energy stored in the bonds of chemical compounds, which can be released or absorbed during a chemical reaction.

Front

In an exothermic reaction, what is true about the energy of the products compared to the reactants?

Back

The products have lower energy than the reactants.

Front

In an endothermic reaction, what is true about the energy of the products compared to the reactants?

Back

The products have higher energy than the reactants.

Front

What is the law of conservation of energy?

Back

Energy cannot be created or destroyed, only transformed from one form to another.