Use the Standard Reaction Enthalpies Given Below to Determine Δ_rH°

question 125

Multiple Choice

Use the standard reaction enthalpies given below to determine Δ_rH° for the following reaction: P₄(g) + 10Cl₂(g) → 4PCl₅(s) Δ_rH° = ?
Given:
PCl₅(s) → PCl₃(g) + Cl₂(g) Δ_rH°= +157 kJ
P₄(g) + 6Cl₂(g) → 4PCl₃(g) Δ_rH° = -1207 kJ

• A)-1835 kJ mol^-1
• B)-1364 kJ mol^-1
• C)-1050 kJ mol^-1
• D)-1786 kJ mol^-1
• E)-2100 kJ mol^-1

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