(a) If the standard enthalpy change for the reaction 2-ethyl- I -butene → I -hexene is + I 5.3 kJ mol-r (+3.66 kcal mol-t). and if Afli for l-hexere is -40.5 kJ mol-r (-9.68 kcal mol-1 2-methy lpropene, -17.3 kJ mol-1 (- 4.14 kcal mol-1)
(b) which butane isomer in part (a) is more stable?