So any data sheet will tell you;
Group 1: methane boils at: -164 deg C methanol boils at: 65 deg C Group 2: decane boils at: 174 deg C 1-decanol boils at 229 deg C
that being said; why is the difference in boiling point so much greater between methanol and methane than it is between 1 decanol and decane ?
As well is there anything else other than difference in non-polarity and IMF's that contribute to differences between molecules in individual groups (i.e. between methane and methanol; between decane and 1-decanol)