If the molecular weights of each of the following C2H6,CH3OH,CH3F are nearly. So,the right ascending arrangement of their boiling points is ....?

1 Answer
anor277
Nov 15, 2017

Their respective order of boiling points FOLLOWS the extent of intermolecular interaction.....

Explanation:

Methanol has hydrogen bonding available as a (potent) intermolecular force of attraction, and should be LESS volatile than methyl fluoride, which has a molecular dipole, the which in turn should be less volatile that ethane, which only has weak dispersion force operating between molecules.

And as chemists, as physical scientists, we should interrogate the data.

#"Normal boiling point, ethane,"# #-89.0# #""^@C#

#"Normal boiling point, methyl fluoride,"# #-78.4# #""^@C#

#"Normal boiling point, methanol,"# #+67.4# #""^@C#

Are these data consistent with our argument? Why or why not?

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