Energy Changes in Chemical Reactions

When chemical bonds form, they absorb energy.

• True

• False

The breaking of chemical bonds requires energy.

• True

• False

Endothermic reactions absorb more energy than they release.

• True

• False

How do you know a reaction is an exothermic one?

• The temperature rises.

• The temperature decreases.

• It turns yellow.

• It gives off an odor.

Combustion is an exothermic reaction.

• True

• False