# ap chem

posted by alexandra

calculate the lattice enthalpy of potassium fluoride from the following data:
enthalpy of formation of K(g):
+89 kJ · mol−1
first ionization energy of K(g):
+418 kJ · mol−1
enthalpy of formation of F(g):
+79 kJ · mol−1
electron affinity of F(g):
+328 (H = −328) kJ · mol−1
enthalpy of formation of KF(s):
−567 kJ · mol−1

Options:

1. 1481 kJ · mol−1
2. 904 kJ · mol−1
3. 497 kJ · mol−1
4. 347 kJ · mol−1
5. 825 kJ · mol−1

1. SraJMcGin

You might like some of the following links:

http://search.yahoo.com/search?fr=mcafee&p=how+to+calculate+lattice+enthalpy

Sra

2. DrBob222

You want to use the Born-Haber cycle.

3. Lola

5. 825

4. ?

The answer is 5) 825 kJ · mol−1

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