Reading bond energy tables

[bdc142]

When reading bond energy tables for multiple bonds (ex. C triple bonded to C), is the given bond energy the energy needed to break all THREE bonds? Or just the second pi-bond?

---

Members don't see this ad.

 

[chiddler]

all three.

it's also how much energy is released when the elemental atoms form bonds

like if C-O is 100, then you put in 100 to break it. but then you also get 100 when it reforms.

which is why enthalpy is deltaH = bonds broken - bonds formed, making it negative equating with heat release because reforming more stable bonds has a net release of heat.

 

[bdc142]

Ok, thanks!