🤓 Based on our data, we think this question is relevant for Professor Todd's class at VANDERBILT.
We are asked to explain why the lattice energy of potassium bromide is more exothermic than the lattice energy of rubidium iodide.
Lattice energy represents the union of a gaseous cation and a gaseous anion in the formation of an ionic solid.
There are two main factors that contribute to the lattice energy of an ionic solid:
Rubidium iodide has a lattice energy of -617 kJ/mol, while potassium bromide has a lattice energy of -671 kJ/mol.
Why is the lattice energy of potassium bromide more exothermic than the lattice energy of rubidium iodide?
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Based on our data, we think this problem is relevant for Professor Todd's class at VANDERBILT.