So let's actually start running up the steps of the born Haber cycle. This stuff is gonna be our final overall reaction for the born Haber cycle. That's a label, as we know that the product at the very end is going to be the ionic compound that we just talked about earlier. We're going to castrate that is negative. So I'm just gonna right change in interview in this step. And we know that because it states in the problem that the change in energy is negative. So the overall reaction of this born haber cycle is going to be exo thermic. That's actually start out our diagram by writing out our final equation our overall reaction because that is gonna home guide us. So we want to make sure we have two moles of carbon throughout the cycle. Remember that we're going to be having two moles of carbon at the end. That's going to be calcium as a solid as well as two moles of carbon. So let's start with our elements in their natural state. And when we're going downwards, we are releasing energy. I just want to point out that whenever we construct a born haber diagram, we want to be writing in order of increasing and foky on the page. Now we can begin constructing are born haber diagram. In addition, this is going to be the step that the change of enters you were going to be looking for at the end is going to be the change in energy of this step is going to be a lattice energy. This is super important causes going to influence our steps in the born haber cycle. Is this a bit of a special case where the ions that are going to be forming this compound, they're gonna be calcium with plus to charge and two carbons and diatonic form with a minus one Charge a girl. Looking at this, I on a compound, you might assume that calcium will have a charge of plus two and Carbide will have a charge of minus one. We're going to be forming calcium carbide. Before we begin this problem, it's important to point out something about our Ionic content.
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