Calculate the Lattice Energy of Sodium Fluoride from the Following $\frac { 1 } { 2 }$

question 114

Multiple Choice

Calculate the lattice energy of sodium fluoride from the following data:
Ionization energy of Na: 496 kJ/mol
Electron affinity of F: -328 kJ/mol
Energy to vaporize Na: 108 kJ/mol
F₂ bond energy: 160 kJ/mol
Energy change for the reaction:
Na(s) + $\frac { 1 } { 2 }$
F₂(g) $\rightarrow$ NaF(s) ; $\Delta$ H = -575 kJ

• A) 931 kJ/mol
• B) -931 kJ/mol
• C) -1011 kJ/mol
• D) 1,011 kJ/mol
• E) -851 kJ/mol

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