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Calculate the Lattice Energy of Magnesium Sulfide from the Data \rightarrow

Question 6

Multiple Choice

Calculate the lattice energy of magnesium sulfide from the data given below. Mg(s) \rightarrow Mg(g) ?H °\degree = 148 kJ/mol
Mg(g) \rightarrow Mg2+(g) + 2e¯ ?H °\degree = 2186 kJ/mol
S8(s) \rightarrow 8S(g) ?H °\degree = 2232 kJ/mol
S(g) + 2e¯ \rightarrow S2¯(g) ?H °\degree = 450 kJ/mol
8Mg(s) + S8(s) \rightarrow 8MgS(s) ?H °\degree = -2744 kJ/mol
Mg2+(g) + S2¯(g) \rightarrow MgS(s) ?H °\degree 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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