breaking and forming bonds; energy input and release

[doubledoctordoubletrouble]

---

Members do not see this ad.

So I have it figured out that breaking bonds always requires an input of energy.
Is it safe to assume that forming bonds always releases energy?

 

[amy_k]

yes if the bond which is formed is stable.

 

[erythrocyte666]

I think ALL bonds release energy when they form. However, they can release less energy than was put into system while breaking bonds.

 

[amy_k]

If the bond(s) formed were unstable, relative to the starting material (atoms or molecules), they will be higher in energy than the original bond(s) causing an overall absorption of energy. Assuming that bond formation always releases energy assumes that every single bond that forms always results in a more stable molecule than the original particles.

 

[Buzzin]

Easy way to remember this...Making Bonds Makes Energy, Breaking Bonds Takes Energy. Just remember that makes goes with makes and ur good.

 

[sweetx56]

In addition to your question, can I ask, if making a bond releases energy, WHY IS Delta G + WHEN FORMING BONDS? (endothermic in respect to deltaS, deltaG, deltaH)

 

[chemtopper]

Delta G depends on two factors : delta H and delta S
There are many exothermic reactions in which delta S is negative and TdeltaS >deltaH