Question

Out of nacl and mg which has higher lattice energy and why

Answer 1

Answer:

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The lattice energy of an ionic compound is the enthalpy change which occurs when one mole of an ionic compound dissociates into its ions in gaseous state.

More ionic is a compound, stronger would be the ionic bond and more would be the lattice enthalpy.

In MgO, the ionic bond is stronger than in NaCl because of more charge on the ionic species in the former ${Na}^+$and ${O}^-$ as compared to ${Na}^+$and ${Cl}^-$). Because of this the ionic interactions are stronger in MgO than in NaCl. As a result the lattice enthalpy of MgO is higher than NaCl.

Answer 2

Answer:

Nacl

Explanation:

(I assume that it is nacl and mgcl)

Lattice energy α 1/size of cation

Thus the smaller the cation greater will be the polarization i.e. charge density and thus, nacl will have higher lattice energy