Problem: Acetone, H3CCOCH3, has a normal boiling point of 56 ºC. Based on the data given in the figure, would you expect acetone to have a higher or lower vapor pressure than ethanol at 25 ºC?

🤓 Based on our data, we think this question is relevant for Professor Geissler's class at CAL.

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FREE Expert Solution

We are being asked to rank the given compounds in order of decreasing vapor pressure.


Vapor pressure

▪ is the pressure exerted by a vapor in equilibrium with its condensed phase
influenced by intermolecular forces between molecules

Boiling Point

▪ the temperature at which a liquid change into vapor
influenced by intermolecular forces between molecules


Intermolecular Forces (IMF) are the attractive forces between 2 molecules.

Ion-dipole

strongest IMF
▪ deals with the attraction between an ion and a polar compound.

 Hydrogen Bonding

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Problem Details

Acetone, H3CCOCH3, has a normal boiling point of 56 ºC. Based on the data given in the figure, would you expect acetone to have a higher or lower vapor pressure than ethanol at 25 ºC?
A graph of vapor pressure versus temperature shows curves for diethyl ether (normal boiling point 34.6 Celsius at 760 torr), ethyl alcohol (normal boiling point 78.3 Celsius at 760 torr), water (normal boiling point 100 Celsius at 760 torr), and ethylene glycol (normal boiling point not listed).

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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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Based on our data, we think this problem is relevant for Professor Geissler's class at CAL.