How Much Energy Is Required to Decompose 765 G of PCl₃

question 51

Multiple Choice

How much energy is required to decompose 765 g of PCl₃ according to the reaction below? The molar mass of PCl₃ is 137.32 g and may be useful. 4PCl₃(g) → P₄(s) + 6Cl₂(g) H° = +1207 kJ

• A) 2.31 × 10³ kJ
• B) 4.33 × 103 kJ
• C) 6.72 × 10³ kJ
• D) 1.68 × 10³ kJ
• E) 5.95 × 10³ kJ

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