With the help of labelled diagram describe in brief an activity to show sublimation of Ammonium Chloride?
Ref: https://edurev.in/question/475798/With-the-help-of-labelled-diagram-describe-in-brief-an-activity-to-show-sublimation-of-Ammonium-Chlo
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 chloride
Activity:
1. Take some ammonium chloride. Crush it and put it in a china dish.
2. Put an inverted funnel over the china dish.
3. Put a cotton plug on the stem of the funnel, as shown in the diagram below.
4. Now, heat the china dish slowly with the help of a Bunsen burner and observe.
5. Ammonium chloride which is in the solid state on exposure to heat will directly change into the vapour state.
6. The vapours on rising up in the funnel will start condensing and form crystals of ammonium chloride.
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.
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