|  |  |  |  |  |  |  |  | 
   
    | • | Stronger the
    intermolecular forces the 
 |  | 
   
    |  | higher the
    melting and boiling points 
 |  | 
   
    |  | 
   
    | • | In general for
    cmpds of similar weight: 
 |  | 
   
    |  | polar moleculaes
    have stonger forces than 
 | 
   
    |  | nonpolar cmpds 
 |  | 
   
    |  | 
   
    | • | In general for
    similar structure the greater 
 |  | 
   
    |  | the mass the
    stronger the forces 
 |  |