The Reaction of Ethylene (C₂H₄) with Butadiene (C₄H₆) to Form

question 41

Multiple Choice

The reaction of ethylene (C₂H₄) with butadiene (C₄H₆) to form cyclohexene (C₆H₁₀) has an activation energy (E_a) of 115 kJ/mol. The reverse reaction (decomposition of cyclohexene to ethylene and butadiene) has an activation energy of 287 kJ/mol. What is the heat of reaction, Δ H_rxn, for the forward reaction?

• A)+115 kJ/mol
• B)+287 kJ/mol
• C)−287 kJ/mol
• D)+172 kJ/mol
• E)−172 kJ/mol

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