Consider the following liquids with similar molar masses.Predict which liquid has the highest boiling point based only on vapor pressure data.

Question

Quizplus · Accepted Answer

The liquid with the highest boiling point will have the lowest vapor pressure. This is because a higher vapor pressure means that more molecules are escaping the liquid phase and entering the gas phase, which is what happens during boiling. Therefore, we need to find the liquid with the lowest vapor pressure. In this case, butyl alcohol has the lowest vapor pressure of all the options, indicating that it has the strongest intermolecular forces and will require the most energy (i.e. highest boiling point) to overcome those forces and boil.

Consider the Following Liquids with Similar Molar Masses