Question

1) Why do we feel cool when we amount of acetone orpetrol in our put small palm?​

Answer 1

Answer:

When we put some acetone 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 on it.

Answer 2

Evaporation : Process of conversion of liquid into vapours at any temperature below it's boiling point is called evaporation .

Evaporation is a surface phenomenon i.e it's absorbs the latent heat .

When we pour acetone or petrol on our palm we feel cool because it absorbs the latent heat from our palm ( surface phenomenon ) .