Problem: Ethene (C2H4) can be halogenated by the following reaction: C2H4(g) + X2(g) ⇌ C2H4X2(g), where X2 can be Cl2, Br2, or I2.Use the thermodynamic data given below to calculate ΔG˚ for the halogenation reaction by I2 at 26 ˚C.CompoundΔH˚f (J/mol K)ΔS˚f (J/mol K)C2H4Cl2(g)–129.7308.0C2H4Br2(g)38.3330.6C2H4I2(g)66.5347.8

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Ethene (C2H4) can be halogenated by the following reaction: C2H4(g) + X2(g) ⇌ C2H4X2(g), where X2 can be Cl2, Br2, or I2.

Use the thermodynamic data given below to calculate ΔG˚ for the halogenation reaction by I2 at 26 ˚C.

CompoundΔH˚f (J/mol K)
ΔS˚f (J/mol K)
C2H4Cl2(g)–129.7308.0
C2H4Br2(g)38.3330.6
C2H4I2(g)66.5347.8

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