Physical Properties, Chain Length, and Branched Groups (Grade 12 NSC Matric Physical Sciences): Flashcards

$C_nH_{2n+2}$ where $n$ = number of carbon atoms

Weak intermolecular attractions between all molecules

Boiling point increases as chain length increases

Gases

Solids

Straight-chain alkanes have higher boiling points

Pack closely, more surface area, stronger van der Waals forces

Branches prevent close packing, reduced surface area contact

Melting point increases as chain length increases

Saturated hydrocarbons with only C and H atoms