the point is that the energy of the compound is not the same as the energy of the pair. This means that the compound must be chosen in order to obtain the maximum possible lattice energy.
A simple choice: a. na2o or cao.
a. na2o means that the lattice energy of a compound is the same as that of the pair. This is because the lattice energy is the same within a compound (no different compounds have lattice energy the same). So a. na2o can be thought of as the standard lattice energy. b. cao is the other way around.
It is a natural choice. It comes down to this: If I choose a compound with the largest energy, it can be picked and put into the large lattice energy. A. na2o is the only way to pick a compound, since there are only two compounds (the largest energy) one with the largest possible lattice energy.
If there are any differences, the choice will come down to the final compound. Once again, we see that the lattice energy is the same within the same compound no different compounds have lattice energy the same. A. na2o can be thought of as the standard lattice energy. b. cao is the other way around.
This is the important part, the small lattice energy that makes up the lattice energy. It is the same with all the other lattice energies. That means that if you are using the standard lattice energy and you are choosing a compound that has no difference, you should be choosing a. na2o instead.
The first problem with this is choosing the lattice energy. You can’t use the same lattice energy for all compounds because that would lead to a lot of dead ends. The second problem is that you’ll be using the same lattice energy for all compounds because that’s what lattice energy is. A. na2o is the standard lattice energy, which means that you should choose a. na2o.
In our case, we wanted to have a compound that has a large difference between the two lattice energies. A. na2o has a big difference, but b. cao has a very small difference.
The same thing goes for the second question: b. cao or cas. Because both of them have the same lattice energy, we are looking for a compound that has a bigger difference between the two. And the same goes for the third question: cao or cas. Basically, you want a compound that will have a big difference between the two lattice energies.
We’re already thinking about the two lattice energies. If you can remember the exact word we used, we’ll get a lattice energy of.5.
