For each of the following pairs of compounds, identify the compound that would have the higher heat of combustion:
Alright guys. So, for this question we're looking at the heat of combustion for both of these rings. Notice that we have a seven membered ring and an eight membered ring. So, be thinking of your ring stability, and for this question we're looking at specifically the heat of combustion. So, for heat of combustion, we can abbreviate that as HOC for this problem, right? We're going to see just a greater heat of combustion, right? Remember, that's just trying to see how energy, how much energy these molecules release when they explode, right? We're going to say that the greater heat of combustion they have that means they have more energy, okay? that's what we're trying to measure here, and in the process more energy, what does that mean? that means less stability, so if we want to know which one has the greater heat of combustion, we just have to look at these two rings and say which one's going to be the less stable. Well, the carbon, the ring with eight carbons, that's going to have more strain in it then say our seventh carbon ring, right? But not only that it also has more carbons. So, being that it has more carbons and there's more strain going on the more stable ring is going to be the one on the left, the seven carbon ring, meaning that our eight carbon ring is going to have a higher heat of combustion, right? Because it's going to be less stable. Alright guys, so we can say that our answer here is this one right here, this eight membered ring is going to have the larger heat of combustion because it's less stable and it's going to release more energy. Alright guys? Well, hopefully that makes sense.