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

question 2

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.

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