Chemistry - Thermochemistry Question with Solution | TestHub

2-Butene is a more substituted and thus more stable alkene than 1-Butene (Statement 2 is correct). Both isomers combust to produce the same products, 4CO₂ + 4H₂O. Consequently, the more stable 2-butene begins at a lower enthalpy and releases less heat upon combustion. This means that the absolute value of the enthalpy of combustion for 2-butene is less than that for 1-butene: |Δ_c H(2-butene)| < |Δ_c H(1-butene)| (Statement 1 is correct). Statement 2 provides the precise explanation for this observation. The answer is (a).