Author Question: Calculate the lattice energy for NaCl(s) using a Born-Haber cycle and the following ... (Read 40 times)

burton19126 · **on:** Feb 15, 2020

Question 1

Calculate the energy change for the formation of LiCl(s) from its elements in their standard states and the following tabulated information:

Li(s) + 1/2 Cl2(g) → LiCl(s)

?

Li+(g) + Cl-(g) → LiCl(s)

-853 kJ/mol

Li(s) → Li(g)

+159.4 kJ/mol

1/2 Cl2(g) → Cl(g)

+121.7 kJ/mol

Cl(g) + e- → Cl-(g)

-348.6 kJ/mol

Li(g) → Li+(g) + e-

+520.2 kJ/mol

◦ -400.3 kJ/mol
◦ +1305.7 kJ/mol
◦ -627.2 kJ/mol
◦ +296.9 kJ/mol

Question 2

Calculate the lattice energy for NaCl(s) using a Born-Haber cycle and the following information:

NaCl(s) → Na+(g) + Cl-(g)

?

Na(s) + 1/2 Cl2(g) → NaCl(s)

-411.0 kJ/mol

Na(s) → Na(g)

+107.3 kJ/mol

Na(g) → Na+(g) + e-

+495.8 kJ/mol

1/2 Cl2(g) → Cl(g)

+121.7 kJ/mol

Cl(g) + e- → Cl-(g)

-348.6 kJ/mol

◦ +787.2 kJ/mol
◦ +34.8 kJ/mol
◦ +1512 kJ/mol
◦ +690.3 kJ/mol

brittrenee · **Reply #1 on:** Feb 15, 2020

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