A Question 1 (Mandatory) (0.175 points) Retake question An enthalpy of reaction diagram for the two possible H atom abstraction reactions that could occur for 2-methylpropane is shown. What is the ~ energy difference in kcal/mole that will make this reaction selective? (ie. The abstraction of the tertiary H occurs almost exclusively.) CH3 H3C -C-CH3 AHO , + Cl CH3 H3C C -CH2 AH 10 H + H-CI AH30 CH3 H3CC- -CH3 + H-CI