If enthalpy of hydrogenation of C6H6(ℓ) into C6H12(ℓ) is –205 kJ & resonance energy of C6H6(ℓ) –152 kJ/mol then enthalpy of hydrogenation of 1,4-cyclohexadiene (ℓ) is [Assume ΔHvap of C6H6(ℓ), C6H8(ℓ), C6H12(ℓ) all are equal]

Engineering

Chemistry

Enthalpy of Neutralisation and Resonance Energy

Question

If enthalpy of hydrogenation of C₆H₆(ℓ) into C₆H₁₂(ℓ) is –205 kJ & resonance energy of C₆H₆(ℓ) –152 kJ/mol then enthalpy of hydrogenation of 1,4-cyclohexadiene (ℓ) is
[Assume ΔH_vap of C₆H₆(ℓ), C₆H₈(ℓ), C₆H₁₂(ℓ) all are equal]

–357 kJ/mol

–535.5 kJ/mol

None

–238 kJ/mol

LiveFree JEE Main Previous Year Online Papers Live Free JEE Advance Previous Year Online Papers

College PredictorLive

Know your College Admission Chances Based on your Rank/Percentile, Category and Home State.

Get your JEE Main Personalised Report with Top Predicted Colleges in JoSA

= ΔHT – ΔH_A = – 152
= ΔHT = – 152 – 205 = – 357

ΔH = + 2 × (–119) = – 238 kJ/mol