in 100 words or more each with references and in text citations answer the 8 questions.

What are the most important intermolecular forces? And what are the mechanisms by which these intermolecular forces work? What is hydrogen bonding and      how might hydrogen bonding be used to explain the substantial difference      in boiling between ethanol CH3CH2OH (grain alcohol)      and dimethyl ether (CH3OCH3)? A hydrogen      bond is an attraction between a slightly positive hydrogen on one      molecule and a slightly negative atom on another molecule. Hydrogen bonds      are dipole-dipole forces. The large electronegativity difference between      hydrogen atoms and several other atoms, such as fluorine, oxygen and      nitrogen, causes the bond between them to be polar. I will look forward to      hear from you all on this. Determine      intermolecular forces present in molecules and compounds. Explain      surface tension, viscosity, and capillary action. Explain      vapor pressure, vaporization, sublimation and fusion. Explain      heating curves and phase diagrams. Describe      crystalline solids.

8. What are intermolecular forces and how do they compare to intra-molecular forces such as ionic or covalent bonding? What impact do intermolecular forces have on the melting point and the boiling point of a substance?