00:01
Okay, so in this problem we're given a reaction and we are asked to calculate the delta h for the reaction using bond energies from table 8 .4 of the textbook.
00:12
So what i wrote here was first the actual reaction, then i wrote the same reaction but showing all of the bonds involved for each of the compounds.
00:23
Now in each of the structures that i wrote i am not showing the free electrons because they are not relevant for this problem, so i am just showing the actual bonds between different elements that we're going to have to break or form.
00:37
And right below i also wrote the values for each one of the bond energies that i got from table 8 .4 of the textbook as the problem requires.
00:49
The units of the bond energies in all cases is kilojoules per moles.
00:54
Okay, so let's proceed to solve these problems.
00:57
So when we use bond energies to find the delta h of our reaction we have on one hand bonds that are broken on the reactant side and bonds that are formed on the product side.
01:09
So this is the reactant side and this is the product side.
01:13
Here on the reactant side the bonds are broken and on the product side, the reactant side, and on the product side bonds are formed.
01:27
Okay, so the equation for calculating delta h using bond energies is essentially the sum of the bond energies sum of the bond energies for the reactants...
