Question

8. What is sublimation? Why do some substances like naphthalene undergo sublimation on heating?​

Answer 1

Answer:

Sublimation is caused by the absorption of heat which provides enough energy for some molecules to overcome the attractive forces of their neighbors and escape into the vapor phase. Since the process requires additional energy, it is an endothermic change.

Answer 2

Answer:

The process in which solid is directly converted into gaseous state.

Eg: Naphthalene balls,camphor