Question

Which substance has the highest vapor pressure at room temperature?

Answer 1

Answer:

At a pressure greater than 1 atm, water boils at a temperature greater than 100°C because the increasedpressure forces vapor molecules above the surface to condense. Hence the molecules must have greaterkinetic energy to escape from the surface.

Answer 2

Explanation:

Thus at room temperature, the substance with the lowest boiling point will have the highest vapor pressure (easiest to get into the gas phase). The substance with the highest boiling point will have the lowest vapor pressure. Vapor pressure is a liquid property related to evaporation.