These molecules can be raked as follows from lowest to highest boiling point; propane < acetone < ethanol.
Boiling points
The term boiling point is the temperature at which atmospheric pressure equals the pressure of the surroundings. The boiling point of a substance depends on the polarity of the molecule. The more polar the molecule, the higher its boiling point.
Using this information, these molecules can be raked as follows from lowest to highest boiling point; propane < acetone < ethanol.
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