Consider the following reactions and their heats of combustion. Compound Combustion Reaction 1-butene HC=CHCHCH +604CO+ 4HO CH3 cis- 2-butene trans-2- butene 2-methyl-1- propene H3C, H HC H H H CH3 +60 4CO + 4HO +60 4CO+ 4HO HC=C(CH)+60 4CO+ 4HO -2719 kJ/mol -2712 kJ/mol -2707 kJ/mol -2703 kJ/mol With the above information and your knowledge of alkenes, select the statements that are TRUE. 1-Butene is the most stable compound. 2-Methyl-1-propene is the most stable compound. 1-Butene is the least stable compund. 2-Methyl-1-propene is the least stable compound. The more carbon atoms attached to the double bond, the more stable the alkene. A trans isomer is less stable than a cis isomer due to more steric hindrance. sp hybridized carbon atoms are more electronegative than sp hybridized atoms.