AP Chemistry
3.3 Solids, Liquids, and Gases
3.1 Intermolecular and Interparticle Forces
A student evaluates two nonpolar hydrocarbon solvents for a fast-drying coating. Equal volumes of the liquids are placed in separate evacuated flasks of equal volume at \(25^\circ\text{C}\). After equilibrium is established, some liquid remains in each flask.
Which statement best predicts the relative equilibrium vapor pressures of the two liquids and explains the prediction?
| Solvent | Molecular formula | Condensed structural formula |
|---|---|---|
| Straight-chain hexane | \(\text{C}_6\text{H}_{14}\) | \(\text{CH}_3\text{CH}_2\text{CH}_2\text{CH}_2\text{CH}_2\text{CH}_3\) |
| 2,2-Dimethylbutane | \(\text{C}_6\text{H}_{14}\) | \(\text{CH}_3\text{C}(\text{CH}_3)_2\text{CH}_2\text{CH}_3\) |
Which statement best predicts the relative equilibrium vapor pressures of the two liquids and explains the prediction?
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