Explain the differences in the boiling points between the members of’ each of these pairs of compounds:

(a)        CH₃ (CH₂)6 CH3                    bp: 126°C

            CH3 (CH2)8 CH3                   bp: 174°C

(b)        CH3CH2CH2OH                   bp: 97°C

            CH3CH2OCH3                      bp: 11°C

(c)        CH3CH2CH3                         bp: – 42°C

            CH3OCH3                              bp: – 23°C