Using the Following Thermochemical Data: 2Sm(s)+ 6HF(g)→ 2SmF₃(s)+ 3H₂(g)

question 39

Multiple Choice

Using the following thermochemical data: 2Sm(s) + 6HF(g) → 2SmF₃(s) + 3H₂(g)
Δ_rH° = -1929.4 kJ/mol-rxn
2Sm(s) + 6HCl(g) → 2SmCl₃(s) + 3H₂(g)
Δ_rH° = -1498.0 kJ/mol-rxn
Calculate Δ_rH° for the following reaction:
SmF₃(s) + 3HCl(g) → SmCl₃(s) + 3HF(g)

• A) -3427.4 kJ/mol-rxn
• B) 431.4 kJ/mol-rxn
• C) 215.7 kJ/mol-rxn
• D) 862.8 kJ/mol-rxn
• E) -1713.7 kJ/mol-rxn

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