Question

8. Why does our palm feel cold when we put some petrol on it?

Answer 1

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When we put some acetone or petrol or perfume on our palm, it evaporates. During evaporation, particles of the liquid absorb energy from the surface of the palm to compensate for the loss of energy, making the surroundings cool. Hence, our palm feels cold when we put some acetone or petrol or perfume on it.

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Answer 2

When we put petrol on our hands, it absorbs energy from the surroundings and evaporates causing a cooling effect in our hands.

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