0t女车 Boiling Points of Alkanes Branched alkanes have less surface area contact,so weaker intermolecular forces. 400 300 CH3一(CH2)m-CH 200 uod n-alkanes 100 CH3 3um!oq 0 CH-(CH2)CH3 -100 isoalkanes CH3 -200 0 5 10 15 20 number of carbon atomsBoiling Points of Alkanes Branched alkanes have less surface area contact, so weaker intermolecular forces