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ChemistryChemistry
11 July, 04:01

Calculate the lattice energy for NaF (s) given the following

sublimation of energy + 109 kj/mol

Hf for F (g) + 77 kj/mol

first ionization energy of Na (g) + 495

electron affinity of F (g) - 328

enthalpy of formation of NaF (s) - 570 kj/mol

A. - 177

B. 192

C. - 804

D. - 1047

E. - 923

+3
Answers (1)
  1. 11 July, 07:57
    0
    Answer: E

    Explanation:

    The lattice energy is the energy change when one mole of a crystal is formed from its components ions in its gaseous sate

    Therefore lattice energy = heat of Sublimation + ionization energy + electron affinity - (heat of formation)

    Therefore lattice Energy = 109 + 495 - 328 + 570.

    Lattice energy = - -923kjmol-1
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Home » Chemistry » Calculate the lattice energy for NaF (s) given the following sublimation of energy + 109 kj/mol Hf for F (g) + 77 kj/mol first ionization energy of Na (g) + 495 electron affinity of F (g) - 328 enthalpy of formation of NaF (s) - 570 kj/mol A.
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