Energy Changes in a Chemical Reaction Quiz

Forming a chemical bond __________

• absorbs energy from the surroundings

• releases energy into the surroundings

• creates energy that did not previously exist

• uses up energy that then no longer exists

Endothermic reactions ______.

• release more energy than they absorb

• absorb more energy than they release

• release and absorb exactly the same amount of energy

• can either release more energy than they absorb or absorb more energy than

  they release, depending on the reaction

A chemical bond __________energy when it breaks.

• increases

• decreases

• absorbs

• releases

Energy is _________ when bonds form.

• released

• absorbed

• destroyed

• created

Energy is _________ when bonds break.

• absorbed

• created

• destoryed

• released

Energy is needed to break bonds in chemical reactions.

• True

• False

A chemical reaction in which more energy is absorbed than is released is endothermic

• True

• False

A change in _____ is a sign of energy being used in a chemical reaction.

• temperature (hot or cold)

• texture

• color

• smell/odor

If you have a cold compress used by an athlete, what is the energy doing?

• being absored

• being released

• nothing happens

• it is being destroyed

A type of chemical reaction, called combustion, takes place between propane and oxygen in the burners. what allows objects to rise during this chemical reaction?

• chemical reaction releases energy in the form of heat

• chemical reaction absorbs energy

• chemical reaction destroys the energy

• nothing takes place, the object will stay put