00:01
So in this video, we're going to work for your question 84 from chapter 8, which says the standard enthalpy of formation for n0 is 90 kilo is 90 kilo.
00:09
Use this in the values for the oxygen -oxygen -double bond and the nitrogen -nitrogen -triple -bond energies to estimate the bond strength in n -o.
00:17
So the equation for the enthalpya formation, the equation for the formation of n -o is half -02 plus half -in -2 yields n -o.
00:28
And our oxygen is a double bonded species, and our nitrogen is a triple bonded species.
00:34
So let's make a table of the bonds we're breaking and the bonds we're forming.
00:38
So we have our oxygen -oxygen -double bond, which we need to remember to multiply by one -half.
00:43
Our nitrogen -nitrogen -triple bond, which we also need to remember to multiply by one -half.
00:48
And then for the bond we're forming, that's our unknown, and we're going to make it negative because forming bonds releases energy.
00:55
It's exothermic.
00:56
And we don't know what kind of bond it is.
00:59
That's what we want to figure out by comparing to the single, triple, and double bonds of no in table 8 .5.
01:09
So when we add all of this together, we get 718 kilojoules per mole minus x...
