Question$\mathrm{H}_{2} \quad \mathrm{HI} \quad \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}$ \begin{tabular}{|l|l|l|} \hline \text{Highest boiling point} & & \text{Lowest boiling point} \\ \hline \end{tabular}
The correct ranking cannot be determined.

Studdy Solution
Rank the compounds based on the strength of intermolecular forces: - $\mathrm{C}_{2}\mathrm{H}_{5}\mathrm{OH}$ has the strongest intermolecular forces due to hydrogen bonding, leading to the highest boiling point. - $\mathrm{HI}$ has moderate intermolecular forces due to dipole-dipole interactions. - $\mathrm{H}_{2}$ has the weakest intermolecular forces, leading to the lowest boiling point.
The predicted ranking from highest to lowest boiling point is:
1. $\mathrm{C}_{2}\mathrm{H}_{5}\mathrm{OH}$
2. $\mathrm{HI}$
3. $\mathrm{H}_{2}$