Answer:
Due to its weak intermolecular forces which make it volatile.
Explanation:
Hello,
In this case, antiseptic alcohol which chemically named as ethanol has a low boiling point (78.37 °C) and weak intermolecular forces of dipole-dipole kind, which make it volatile, it means it tends to rapidly vaporize even when it is not gently heated, therefore, even a weak force such as rubbing it, is enough to vaporize it out from the skin so it quickly dries.
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Due to low boiling point and weak intermolecular force alcohol is volatile, which makes it to dry quickly from the skin.
• The substances with strong intermolecular forces exhibit lower vapor pressures and are less volatile, on the other hand, the substances with weak intermolecular forces exhibit higher vapor pressures and are more volatile.
• Ethanol, that is, the antiseptic alcohol exhibits a low boiling point of 78.37 degree C and weak intermolecular forces of dipole-dipole kind.
• The characteristics of low boiling point and weak intermolecular forces makes the alcohol volatile.
• It shows that even when it is gently rubbed onto the skin, it vaporizes.
Thus, due to the properties of alcohol, even a weak force like rubbing is adequate to vaporize it out from the skin, and therefore, it dries briskly.
Find out more information about volatility of alcohol here:
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