We are asked to identify which substance has the highest vapor pressure at 25°C based on their boiling points.
Both vapor pressure and boiling point are physical characteristics that are related to the intermolecular forces of attraction (IMFA) that exist between the molecules.
Vapor pressure is the partial pressure of vapor molecules above the surface of the liquid under the dynamic equilibrium condition of condensation and vaporization. The stronger the IMFA, the lower the vapor pressure of the liquid since the liquid particles cannot easily escape as vapor.
Which of the following liquids would exhibit the highest vapor pressure at 25.0°C?
a) Ethyl alcohol, boiling point = 78.3°C
b) Glycerine, boiling point = 290°C
c) Water, boiling point = 100°C
d) Ether, boiling point = 34.6°C
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What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Intermolecular Forces and Physical Properties concept. If you need more Intermolecular Forces and Physical Properties practice, you can also practice Intermolecular Forces and Physical Properties practice problems.
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