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

Question

Kaitlyn Leonard

Chemistry

19 September, 21:15

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

+4

Answers (1)

Know the Answer?

Camila Richard · Answer 1

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

Calculate the lattice energy for NaF (s) given the followingsublimation of energy + 109 kj/molHf for F (g) + 77 kj/molfirst ionization energy of Na (g) + 495electron affinity of F (g) - 328enthalpy of formation of NaF (s) - 570 kj/molA. - 177B. 192C. - 804D. - 1047E. - 923

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