Explain each of the following observations. Be sure to describe the intermolecular forces active in
each set of molecules and how that influences their properties.
a. The boiling points of the halogens increase F2 < Cl2 < Br2 < I2.
b. The boiling point of HF is much higher than HCl, HBr, and HI.
c. The boiling point of CHF3 is much higher that of CF4.
d. The boiling point of ethanol (CH3CH3OH) is much higher than that of dimethyl ether (CH3OCH3).