Why is bond breaking an endothermic process and bond formation is an exothermic process?

Answer 1

the answer is pretty much the same as why freezing is an exothermic reaction-- because the release of energy is occurring as bonds are forming. to form bonds, energy must be inputted or it won't happen naturally. this might lead one to think that it is endothermic but it's not. you have to think of it in terms of the energy of the particles forming the bond.

the particles that will later form the bonds have higher energy to begin with because they have more entropy. when the bond forms, the particles will give off energy in order to sort of move less. they are being ordered, against nature, therefore have less energy.

you can kind of think of it like gas particles coming together to form a liquid. the particles that used to be zooming around are more organized and cannot move as much

in all exothermic reactions the reactants will have higher energy than the products.

Answer 2

Breaking bonds is an endothermic process because more energy is required to break bonds than is released by the formation of products

Answer 3

Breaking bonds either requires or releases energy. Same thing with forming bonds. If a bond formation/break uses more energy than it releases, it is endothermic. And vice versa

Answer 4

Endothermic.