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12 Dec 2019
The following compounds all display the NaCl structure. (i.e. They are isomorphous.) For each pair, indicate which would have the lattice energy of greater magnitude.
BaO CaO
NaBr NaI
CaO KCl
CaSe CaTe
MgO MgS
The following compounds all display the NaCl structure. (i.e. They are isomorphous.) For each pair, indicate which would have the lattice energy of greater magnitude.
BaO CaO
NaBr NaI
CaO KCl
CaSe CaTe
MgO MgS
Irving HeathcoteLv2
13 Dec 2019
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Related questions
Examine the trends in lattice energy in Table 12.1. 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. What is one reason why that the lattice energy of NaF which is -926 kJ/mol is much more negative than those of the other sodium halides?
Table 12.1
Lattice Energies of Some Ionic Compounds
| 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 |
