The vapor pressure of diethyl ether c2h5oc2h5 is greater than the vapor pressure of ethyl alcohol, c2h5oh at any temperature. which best accounts for this difference?

Answer is: ethanol has the lowest vapor pressure because strongest intermolecular force (hydrogen bond).

Hydrogen bond is an electrostatic attraction between two polar groups that between hydrogen atom covalently bound to atoms such as nitrogen, oxygen, and fluorine. Diethyl ether has weak intermolecular force.