Question: What is the enthalpy change for the unknown reaction? P(s) + 3/2Br2() ( PBr3() H = 185 kJ PI3(s) ( P(s) + 3/2I2(s) H =

What is the enthalpy change for the unknown reaction?
P(s) + 3/2Br2(ℓ) ( PBr3(ℓ)
ΔH = −185 kJ
PI3(s) ( P(s) + 3/2I2(s)
ΔH = ?
PI3(s) + 3/2Br2(ℓ) ( PBr3(ℓ) + 3/2I2(s)
ΔH = −139 kJ

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