Assume the compounds below have the same crystal structure. Which has the largest lattice energy? Select...

Question

Question

Assume the compounds below have the same crystal structure. Which has the largest lattice energy?

Select the correct answer below:

NaCl

CsI

RbBr

FrI

Answer 1

Answer #1

Lattice energy = K*q1*q2/r

Here q1=1 and q2=1 for all

So, the one with smallest r will have the largest Lattice energy

r is smallest for NaCl due to comparatively smaller size of Na+ and Cl- as compared to other ions

So, NaCl has smallest lattice energy

Answer: NaCl

Answer 2

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