Homologous series (Edexcel GCSE Chemistry Combined Science): Flashcards

Family of organic compounds with similar features & regular pattern

All members have the same functional group

OH group

Same functional group causes similar reactions

By a $CH_2$ group

Methane ($CH_4$), ethane ($C_2H_6$), propane ($C_3H_8$)

Gradual change; boiling points increase

Larger molecules, more surface area, more energy needed

All compounds follow the same general formula

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

Same molecular formula, different structural formula

They have the same functional group