Catabolism exergonic yet breaking a bond is endothermic?

[ngu9997]

Hi - really basic question here, but I was wondering. In biology it's said that catabolic reactions which break something down release energy, making such exergonic. In chemistry it is said that breaking bonds is endo-thermic. This seems counter-intuitive to me? But, I realize it's because the two concepts are different yet related by a formula? Could someone explain to me why it's not actually counter-intuitive and where my line of reasoning is wrong?Also I guess this question would also work talking about why anabolism is endergonic, yet forming bonds is exothermic.

 

[mfb]

In chemistry you rarely break a bond without forming new ones. "Breaking something down" in biology usually means forming more water and CO2, or other HO and CO bonds, and forming these tends to release a lot of energy compared to CC, CH and OO bonds (e. g. hydrocarbons and oxygen).