A. Calculate the lattice energy of NaI(s) using the following thermodynamic data (all data is in kJ/mol). Note that the data given has been perturbed, so looking up the answer is probably not a good idea. Na(s) ΔHsublimation = 88 kJ/mol
Na(g) Ionization energy = 476 kJ/mol
I-I(g) Bond energy = 131 kJ/mol
I(g) Electron affinity = -315 kJ/mol
NaI(s) ΔH°f = -308 kJ/mol
kJ/mol
Do you expect this value to be larger or smaller than the lattice energy of TlCl(s)? largersmaller
B. Calculate the lattice energy of InBr(s) using the following thermodynamic data (all data is in kJ/mol). Note that the data given has been perturbed, so looking up the answer is probably not a good idea.
In(s) ΔHsublimation = 223 kJ/mol
In(g) Ionization energy = 538 kJ/mol
Br-Br(g) Bond energy = 173 kJ/mol
Br(g) Electron affinity = -345 kJ/mol
InBr(s) ΔH°f = -195 kJ/mol
kJ/mol
Do you expect this value to be larger or smaller than the lattice energy of InCl(s)? largersmaller