$16\mathrm{.}6.$ Assume that the equations shown below represent chemical reactions. Compute the value

of $G_{298}$ for each. The standard states are as follows: $I_2$ gas, unit fugacity; $I_2$ liquid, pure

liquid, $1$ bar, $I_2$ solid, pure solid, $1$ bar. The densities of liquid and solid iodine may be

taken to be $1\mathrm{.}03\frac{g}{c}{m}^3,$ and the gas iodine to be an ideal gas.

$($a$)I_{2(s)}harr{I}_2$

$($b$)I_{2(s)}harr{I}_{2(l)}$

$($c$)I_{2(n)}harr{I}_2$

Some vapor$-$pressure data for iodine are as follows:

"Melting point.

Normal boiling point.