PPT Slide
So, the first equation is ENDOthermic (energy
must be supplied in order to break the bonds) and the
second equation is EXOthermic (energy is given off
when the bonds are made).
This information is handy to know when you want to
look at a chemical equation and figure out whether or
not it is endothermic, exothermic or neither one.
Let us now examine a real chemical equation to see.
On your own paper, now draw the structural formula
for each one of the 4 molecules above. Then go to the