Textbook Problem

Using the heats of fusion and vaporization for water given in Exercise 99, calculate the change in enthalpy for the sublimation of water:

${\text{H}}_{\text{2}}\text{O}\left(s\right)\to {\text{H}}_{\text{2}}\text{O}\left(g\right)$

Using the ∆H value given in Exercise 112 and the number of hydrogen bonds formed with each water molecule, estimate what portion of the intermolecular forces in ice can be accounted for by hydrogen bonding.