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Question

Why Does Our Palm Feel Cold When We Put Some Acetone Or Petrol Or Perfume On It?

Solution
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Our palm feels cold when we put some acetone, petrol, or perfume on it because these substances are volatile liquids, meaning they have low boiling points and readily evaporate. When these substances are applied to our palm, they absorb energy from the palm or surroundings and evaporate, leaving the palm cool. This cooling effect is due to the latent heat of vaporization, which is the energy required to convert a liquid into a gas.

During the process of evaporation, particles of the liquid absorb energy from the surface of the palm, causing a decrease in temperature and making the palm feel cold. This phenomenon is not limited to acetone, petrol, or perfume, but can also occur with other volatile substances.

In summary, our palm feels cold when we put some acetone, petrol, or perfume on it because these substances are volatile liquids that readily evaporate, absorbing energy from the palm or surroundings, and causing a decrease in temperature due to the latent heat of vaporization.

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