Examine the trends in lattice energy in the Table below. The value of the lattice energy becomes somewhat more negative on going from NaI to NaBr to NaCl, and all are in the range from −700 to −800 kJ/mol. Suggest a reason for the observation that the lattice energy of NaF (Δlattice U = −926 kJ/mol) is much more negative than those of the other sodium halides.
Why lattice energy is much more negative than those of the other sodium halides.
The lattice energy of some ionic compounds
Examine the trends in lattice energy in the Table below. The value of the lattice energy becomes somewhat more negative on going from NaI to NaBr to NaCl, and all are in the range from −700 to −800 kJ/mol. Suggest a reason for the observation that the lattice energy of NaF (Δlattice U = −926 kJ/mol) is much more negative than those of the other sodium halides.
Why lattice energy is much more negative than those of the other sodium halides.
The lattice energy of some ionic compounds
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Related questions
Observing the value of lattice energy of compounds NaI to NaBr to NaCl, all are in the range from -700 to -800 kJ/mol. Then why is that the lattice energy of NaF (-926 kJ/mol) is much more negative than those of the other sodium halides?
| Compound |
 |
| LiF | -1037 |
| LiCl | -852 |
| LiBr | -815 |
| LiI | -761 |
| NaF | -926 |
| NaCl | -786 |
| NaBr | -752 |
| NaI | -702 |
| KF | -821 |
| KCl | -717 |
| KBr | -689 |
| KI | -649 |
Observing the value of lattice energy of compounds NaI to NaBr to NaCl, all are in the range from -700 to -800 kJ/mol. Then why is it that the lattice energy of NaF (-926 kJ/mol) is much more negative than those of the other sodium halides?
| Compound |
 |
| LiF | -1037 |
| LiCl | -852 |
| LiBr | -815 |
| LiI | -761 |
| NaF | -926 |
| NaCl | -786 |
| NaBr | -752 |
| NaI | -702 |
| KF | -821 |
| KCl | -717 |
| KBr | -689 |
| KI | -649 |