Which has maximum volatility?
Correct answer: A. Diethyl ether
- A. Diethyl ether
- B. Ethanol
- C. Water
- D. All same
Explanation
Diethyl ether has the maximum volatility. Volatility is a measure of how easily a substance changes from a liquid to a gas. It is affected by the strength of the intermolecular forces between the molecules in the substance. Diethyl ether has the weakest intermolecular forces of the three substances. This is because it is a nonpolar molecule, and nonpolar molecules do not have any permanent dipoles. Without permanent dipoles, they cannot form hydrogen bonds or dipole-dipole interactions. The only intermolecular forces that exist between diethyl ether molecules are London dispersion forces.
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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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