eot2

Forming a chemical bond………………

• Absorbs energy from the surroundings

• Releases energy into the surroundings

• Uses up energy that then no longer exists

endothermic reactions…………

• Absorb more energy than they release

• Release more energy than they release

• Release and absorb the same amount of energy

A chemical bond……………energy when it breaks.

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Answer explanation

Absorbs

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

• Color

• Odor

These cause changes in pressure?

• Force and pressure

• Temperature and area

• Force and area

Why are non renewable energy resources limited?

• They take a long time to form

• The environment in which resources were created forming once or only rarely

• Used up faster