Question

why surgeons often spray some ether on skin before performing minor surgery ?

Answer 1

Ether is a volatile substance and to change from the liquid state to the vapor state, it requires latent heat of vaporisation. Ether takes up this heat of vaporisation from the portion of skin it is sprayed on. The energy lost by the particles from the affected area makes the area cool and leaves it numb i.e. the patient doesn't feel much of pain.

Answer 2

Answer:

Explanation:First of all, it is a volatile liquid. And secondly,it is a liquid, so it will evaporate along with our body heat(only the part which is sprayed). Due to this the part in which it is sprayed gets cool as evaporation causes cooling effect. So it becomes less painful and easy to do when an surgeon performs some minor surgery