If the back of your hand is moistened with alcohol , you will find it rapidly becomes dry . Why is it that while it is drying , your hand feels cool ?
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Its because alcohol has less boiling point. It means forces between molecules of alcohol is less (as compared to water).So the the molecules of alcohol gain heat energy from our hand as latent heat of evaporation and evaporates making our hand feels cold.
-ABHINAV SINGH
-ABHINAV SINGH
kulsoomfatima:
thnk u
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Answer:
The alcohol on our hand absorbs its latent heat of vaporisation from the surface of our hands and evaporates. Drawing heat and therefore, cooling our hand in the process.
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