Which has more lattice energy? NaF or NaCl.

NaCl

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NaF

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Same

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Solution

The correct option is B
NaF

Lattice energy is energy released when a lattice forms. Observe that anion is not very large.

$L a t t i c e e n e r g y \propto \frac{1}{r_{+} + r_{-}}$

Among the given compounds, $N a C l$ has higher $(r_{+} + r_{-})$ value.Thus, it has lower lattice energy

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