Consider the isomerization: CH2=CH-CH2-CH=CH2(g) -> CH3-CH=CH-CH=CH2(g). Which of the following stat — Thermodynamics and Thermochemistry Chemistry Question

💡 Solution & Explanation

(a) Conjugated dienes are more stable; isomerization to conjugated diene is exothermic. (b) Since bond types are identical on both sides, enthalpy change equals resonance enthalpy of conjugated product. (c) More stable product has lower energy, so combustion releases less heat. (d) Incorrect — conjugated diene has smaller heat of hydrogenation due to resonance stability.