Endothermic and Exothermic Reactions

Front

What is an exothermic reaction?

Back

An exothermic reaction is a chemical reaction that releases energy, usually in the form of heat, when the products form.

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

What happens to energy when bonds are formed between atoms?

Back

Energy is released when bonds are formed between atoms.

Front

What happens to energy when bonds are broken in reactants?

Back

Energy is absorbed when bonds are broken in reactants.

Front

In an exothermic reaction, what is true about the energy released and the energy required?

Back

In an exothermic reaction, more energy is released when the products form than is required to break the bonds.

Front

What occurs in a chemical reaction where the energy required to break bonds equals the energy released when products form?

Back

Energy remains the same.

Front

What type of reaction occurs when more energy is required to break bonds than is released when products form?

Back

An endothermic reaction occurs.

Front

What is the role of sodium bicarbonate in a chemical reaction?

Back

Sodium bicarbonate typically absorbs more energy than it releases, making it an endothermic reaction.

Front

What is the relationship between bond formation and energy?

Back

Bond formation releases energy, while bond breaking requires energy.

Front

Can energy be created or destroyed in a chemical reaction?

Back

No, energy cannot be created or destroyed; it can only change forms.