Consider the following liquids with similar molar masses.Predict which has the weakest intermolecular attraction based only on vapor pressure data.

Question

Quizplus · Accepted Answer

The vapor pressure of a liquid is inversely proportional to the strength of its intermolecular forces. Therefore, the liquid with the highest vapor pressure (in this case, B-ethyl ether) has the weakest intermolecular forces, while the liquid with the lowest vapor pressure (in this case, D-propionic acid and A-butyl alcohol) has the strongest intermolecular forces. Therefore, B-ethyl ether has the weakest intermolecular attraction.

Consider the Following Liquids with Similar Molar Masses