AP BIOLOGY

Detailed explanation-1: -It usually goes as, “Chemical bonds store energy, and the energy is released when the bonds break.” That is misleading. Energy is not released when the chemical bond between two atoms is broken. In fact, it takes the input of energy to break a bond.

Detailed explanation-2: -The answer is that most bonds cannot actually “store” energy as breaking those bonds actually requires an input of energy. However, bonds do exist that, when broken, can actually release an overall amount of energy that can be used to do useful work.

Detailed explanation-3: -Chemical energy is energy stored in the bonds of chemical compounds, like atoms and molecules. This energy is released when a chemical reaction takes place. Usually, once chemical energy has been released from a substance, that substance is transformed into a completely new substance.

Detailed explanation-4: -Energy is absorbed to break bonds, and energy is evolved as bonds are made. In some reactions the energy required to break bonds is larger than the energy evolved in making new bonds, and the net result is the absorption of energy.

Detailed explanation-5: -Answer and Explanation: This statement is false. Breaking a chemical bond is an endothermic process. All chemical bonds require energy to overcome the attractive forces between the atoms and break the bonds.