[furaniki18]

among 1-pentanol, 2-methylbutan-2-ol and 3-methylbutan-2-ol which would have lowest boiling point?
i think 1-pentanol will have the highest because greater molecular mass means greater van der waals forces and thus, higher boiling point. but which among the other two compounds will have higher boiling point and why?
the forces on the basis of which i tried to analyse further were hydrogen bonding and van der waals...but van der waals wouldn't make a difference as both have same molecular mass. please help..

[Babcock_Hall]

What are the molecular weights of the three compounds?

[Babcock_Hall]

You are making an incorrect assumption, which you will see if you draw the structures out or calculate the molecular formulae or molecular weights.  Also, Van der Waals attractions increase with increasing surface area.