Question

9)What is sublimation? Name two substances which undergo sublimation.
10) Why does steam causes more severe burns than hoiling water?​

Answer 1

Answer:

9)

Sublimation is a process wherein substances convert directly from solid to gas and vica versa, skipping the liquid state.

ex: Naphthalene and Dry Ice (frozen CO2)

10)

The molecules of steam have more latent heat of vaporisation(hidden heat) as compared to that of water. Therefore it produces more severe burns.

Hope it helps