Now, if you've seen my stoichiometric chart under stoichiometry or solution chemistry or gas stoichiometry, this should be pretty familiar to you. But if this is the first time you're seeing this documentary chart, let's go through it all right. So what we need to realize here is that with thermochemical equations, sometimes it's pretty common to be given the ΔH of our chemical reaction.
So we'll start out with ΔH of Given. And like I said before, in stoichiometry we're used to doing a multiple comparison, which can still happen here. But the more important thing is that we establish a connection between the ΔH of reaction and one of the moles for one of the compounds within our chemical reaction. So here we go from ΔH of Given to moles of given.
And what we can say here is that besides going from ΔH you're given to moles of Given, we can go from grams of Given to moles of Given or we can go from ions, atoms, formula units or molecules of given to moles of given. Once we get there, we have to go to moles of our unknown. To do this requires a leap of faith in a sense because you're going from an area where you know information to an area where you know nothing at all.
We call this the jump. When you make this jump, in order to do it correctly you have to do a multiple comparison and use the coefficients in the balanced equation. From this point you are at moles of unknown and from here you can go in any way you want. You can go from moles of unknown to ions, atoms, formula units or molecules. You can go to grams or you can go to a new ΔH of unknown.
So just realize what the thermochemical equation will have. A balanced chemical equation which introduces the idea of stoichiometry before to be a thermochemical equation, will also have the ΔH of reaction present.