Question

an experiment to discuss sublimation and desublimation of camphor

Answer 1

Answer:

Ans: Sublimation: The process of converting solid form of a substance directly into vapour form is called sublimation. In sublimation no liquid state is observed. This is a reversible process. The substances that can undergo sublimation are: Ex: camphor, naphthalene,anthracene and ammonium chlorideActivity: ·         Take some camphor or ammonium chloride. ·         Crush the compound taken and put it in a china dish ·         Put an inverted funnel over the china dish ·         Put a cotton plug on the stem of the funnel ·         Heat the china dish slowly and observe.   Ammonium chloride is the molecule which on heating changes directly into gaseous state. When vapours of Ammonium chloride collected then solid Ammonium chloride is formed.NH4Cl(Solid) ⟺ NH4Cl (vapour) Observation: A change of state directly from solid to gas without changing into liquid state (or vice versa) is observed, this phenomenon is called sublimation.

Answer 2

Answer:

Aim

Explanation:

Experiment: Take some Ammonium chloride powder in a china dish. Cover the china dish with an inverted funnel and put a cotton plug-in end of the funnel so that vapours do not escape. Set up the apparatus as shown. Heat the dish with the burner.