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Question 800014
JEE Chemistry · Medium

Chemical Thermodynamics and Thermochemistry: Mixed MCQ

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MixedMediumQuestion 800014

Question

Resonance energy of benzene is determined experimentally from:
  1. A
    Comparison of ΔHcombustion (actual) with theoretical (using 3 double bonds)
    Correct
  2. B
    Melting point
  3. C
    Density
  4. D
    Dipole moment

Correct answer

Comparison of ΔHcombustion (actual) with theoretical (using 3 double bonds)

Explanation

Resonance energy = (ΔHcombustion theoretical for Kekulé structure) − (ΔHcombustion actual). Benzene burns with less energy than three isolated double bonds → difference is resonance stabilisation energy (~150 kJ/mol).

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