Question #11aaf
1 Answer
Dec 29, 2017
To break a bond, you need energy. When bonds are made, energy is released.
Explanation:
Bonds are 'relatively' stable and as such, require energy to break them. A process whereby the overall energy change is positive is described as endothermic. A decomposition reaction is one in which bonds are broken.
If two atoms form a bond, the bond is highly likely to allow both atoms (or ions) to exist in a lower overall energy. This is why the bond exists. When such a bond is made, the difference in energy between the atoms prior to and after bonding is 'released' and so the process is described as exothermic. The above is also a combination reaction.
