Endothermic and Exothermic Reactions

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs energy from its surroundings, usually in the form of heat.

Front

What is an exothermic reaction?

Back

An exothermic reaction is a chemical reaction that releases energy to its surroundings, usually in the form of heat.

Front

What happens to energy during a chemical reaction?

Back

Energy is neither created nor destroyed; it is transformed from one form to another.

Front

What is chemical potential energy?

Back

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

Front

In an endothermic reaction, what happens to the temperature of the surroundings?

Back

The temperature of the surroundings decreases because the reaction absorbs heat.

Front

In an exothermic reaction, what happens to the temperature of the surroundings?

Back

The temperature of the surroundings increases because the reaction releases heat.

Front

What is the role of energy in breaking chemical bonds?

Back

Energy must be absorbed to break chemical bonds between atoms.

Front

What is the role of energy in forming chemical bonds?

Back

Energy is released when chemical bonds are formed between atoms.

Front

Can energy be created or destroyed during a chemical reaction?

Back

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

Front

What is an example of an endothermic reaction?

Back

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