00:01
Hi, so in this case what we have is the following reaction.
00:03
We have c2f4, which corresponds to carbon -carbon double bond with four flours attached to it, that is going to react with hf in order to produce cf3, single bond, carbon, four flours, and one hydrogen over here.
00:36
So the way that we can estimate the enthalpy for the reaction in terms of the bond energies is the following.
00:44
The enthalpy for the reaction will be equal to the sum of the bonds that are being broken minus the sum of the bonds that are being formed.
01:05
First of all, let's list what bonds are being broken.
01:13
We're breaking an hydrogen -flour bond.
01:17
We are breaking as well a carbon -double bond carbon, because this is changing from a double bond to a single bond.
01:25
And the bonds that are being created are one carbon -flour bond, a carbon -hydrogen bond, and a carbon -carbon bond.
01:46
So if we look at the table that you provided, the hydrogen -hf bond corresponds to 568 kj per mole...