Endothermic and Exothermic Reactions

Front

What happens to heat in an exothermic reaction?

Back

Heat is given out.

Front

What happens to heat in an endothermic reaction?

Back

Heat is taken in.

Front

What characterizes an exothermic reaction in terms of energy?

Back

More energy is released when the bonds in the products are formed than is used to break the bonds in the reactants.

Front

How is energy transferred in a chemical reaction?

Back

Through breaking and forming bonds.

Front

What type of reaction is photosynthesis?

Back

Endothermic.

Front

Define an exothermic reaction.

Back

A reaction that releases energy, usually in the form of heat.

Front

Define an endothermic reaction.

Back

A reaction that absorbs energy from its surroundings.

Front

What is the role of bond formation in exothermic reactions?

Back

Bond formation releases energy.

Front

What is the role of bond breaking in endothermic reactions?

Back

Bond breaking requires energy input.

Front

Give an example of an exothermic reaction.

Back

Combustion of fuels.