Calculate the lattice energy of magnesium sulfide from the data given below. Mg(s) Mg(g) ?H = 148 kJ/mol
Mg(g) Mg2+(g) + 2e¯ ?H = 2186 kJ/mol
S8(s) 8S(g) ?H = 2232 kJ/mol
S(g) + 2e¯ S2¯(g) ?H = 450 kJ/mol
8Mg(s) + S8(s) 8MgS(s) ?H = -2744 kJ/mol
Mg2+(g) + S2¯(g) MgS(s) ?H lattice = ?
A) -3406 kJ/mol
B) -2720. kJ/mol
C) 2720. kJ/mol
D) 3406 kJ/mol
E) None of these choices is correct.
Correct Answer:
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