Hi all,something has me confused.I read that when bonds form, energy is released,but in organic chemistry i read that when bonds break energy is released.This does not sound right.Any help would be appreciated.
Thanks

Hi,ok heres an example, when the atp bond breaks it releases energy,but then i read that when bonds form their release energy.So how does does atp release energy if it breaks? See the confusion?

Try this http://www.newton.dep.anl.gov/askasci/gen99/gen99928.htm

You need to find out all the energies required for bond breaking of all reactant species and energies releasesd from bond formation of all product species.

Then, compare the energy difference.

Thanks for the catch Borek. It would be zero. Man, I was off yesterday.

Delta H is the Change in Enthalpy for a chemical process.  It's been defined as, "The sum of the internal energy of matter" (http://en.wikipedia.org/wiki/Enthalpy) - which means, ina VERY simpplified way, it's the sum of the bond energies.

Energy is stored in bonds.  The bonds themselves are a combination of repulsive and attractive forces, which roughly aer equal to each other when the atoms are at the regular bond length.

Delta H is, of course, equal to H_final - H_initial

If you do an internet search of Enthalpy then you'll get more information than you need.  But it'll help out your sresearch skills   Enjoy!

re-edited my post once again.