Chapter 12.19, Problem 22P

What does a comparison of the heats of combustion of benzene ( $\text{3265 kJ/mol}$

; $\text{781 kcal/mol}$), cyclooctatetraene ( $\text{4543 kJ/mol; 1086 kcal/mol}$), [ $16$

]annulene ( $\text{9121 kJ/mol; 2182 kcal/mol}$), and [18 ]annulene ( $\text{9806 kJ/mol; 2346 kcal/mol}$) reveal?