If the Heat of Hydrogenation of the Hypothetical 1,3,5-Cyclohexatriene Is

question 2

Multiple Choice

If the heat of hydrogenation of the hypothetical 1,3,5-cyclohexatriene is -78.9 kcal/mol,but the heat of hydrogenation of benzene is -49.3 kcal/mol,what is the stabilization energy attributed to the resonance in benzene?

• A) -49.3 kcal/mol + (-78.9 kcal/mol)= -128.2 kcal/mol
• B) -49.3 kcal/mol - (-78.9 kcal/mol)= 29.6 kcal/mol
• C) -49.3 kcal/mol
• D) -78.9 kcal/mol
• E) None of the above.