Question

why we feel cool when we pour acetone on our palm

Answer 1

we feel cool as when we put acetone on our palm it abrobs the latent heat from our hand and change its state and this downing in teperature makes us feel cool

Answer 2

Here is your answer
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The reason being that the energy needed for evaporation is taken from the palm .

That's why.....

by losing heat , our palm feels cool.