Question #efa5d

1 Answer

#CH_4 < C_5H_11OH < CH_3OH < H_2O #


Methane, #CH_4#, has close to non polar bonds but is a nonpolar molecule There is little difference between the electronegativity of Carbon and Hydrogen, plus the molecule has a symmetrical geometry.

Water, #H_2O#, is the most polar molecule with extensive Hydrogen bonding.

The larger molecule pentanol shields the hydrogen bonding from the alcohol part of the molecule interacting with the Oxygen on another pentanol molecule. So the pentanol has less hydrogen bonding than propanol.