自秋不转大对 Boiling Points of Alkanes ■ Branched alkanes have less surface area contact,so weaker intermolecular forces. 400 300 CH3-(CH2)n-CH3 ()uod 3um!oq 200 n-alkanes 100 0 CH-(CH2)CH3 100 isoalkanes CH3 -200 5 10 15 20 number of carbon atomsBoiling Points of Alkanes ◼Branched alkanes have less surface area contact, so weaker intermolecular forces