Final answer:
A liquid with low volatility evaporates slowly due to its low vapor pressure and strong intermolecular interactions. Large molecules within these liquids generally lead to higher boiling points and lower volatility. Adding nonvolatile solutes to a solution further reduces its vapor pressure.
Step-by-step explanation:
If a liquid has low volatility, it means that it has a low vapor pressure, and it evaporates more slowly compared to volatile liquids. Nonvolatile liquids, like mercury, ethylene glycol, and motor oil, have high boiling points and stronger intermolecular interactions, which contribute to their lower vapor pressures. Conversely, volatile substances, such as diethyl ether (ethyl ether), acetone, and gasoline, have higher vapor pressures, low boiling points, and relatively weak intermolecular interactions, causing them to evaporate quickly. The presence of large molecules in a liquid typically indicates a higher boiling point, greater viscosity, and reduced volatility. Furthermore, adding a nonvolatile solute to a solution will lower the solution's vapor pressure.