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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 (Ea) 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 Hrxn, 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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