Which of tho following molecules will showe higher rate of evaporation?
Correct answer: A. Acetone
- A. Acetone
- B. Ethanol
- C. Water
- D. Ethylene glycol
Explanation
Acetone evaporates much faster than water, even though its molecular mass is more than three times as much. Water molecules, in the liquid and solid state, are capable of hydrogen bonding, whereas a collection of acetone molecules in the liquid state do not.
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About Evaporation, Boiling Point and Vapour Pressure
Evaporation is the escape of higher-energy molecules from a liquid surface, while vapour pressure is the pressure exerted by vapour in equilibrium with that liquid. The topic distinguishes evaporation from boiling and relates both to temperature, intermolecular forces, surface area, atmospheric pressure and the boiling point.
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