Question

With the help of an activity show the sublimation process of ammonium chloride

Answer 1

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.hat can undergo sublimation are:
Ex: camphor, naphthalene,anthracene and ammonium chloride
Activity:
·         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.

Hope it helps you....

Answer 2

Answer:

Explanation:

Definition of Sublimation:

The heat absorbed by sublimation, which is the direct conversion of a solid into a vapour, is equal to the combined latent temperatures of fusion and vaporization.

Activity show the sublimation process of ammonium chloride:

Hint: Sublimation can be seen when salt is heated, such as ammonium chloride. I'll show you how to sublimate ammonium chloride salt using a burner and a setup that prevents the produced vapour from escaping.

There are three different types of matter: solids, liquids, and gases. A change in temperature and pressure can alter the condition of a particular substance.

Since sublimation is the process of transforming a substance from its solid state to its vapour state, There is no liquid state seen during sublimation. This process is reversible, meaning that substances whose solid state is changed into a vapour may likewise undergo a direct solid state change. The following list of substances exhibit sublimation: camphor, naphthalene, anthracene, and ammonium chloride.

China dish, funnel, cotton, burner, and ammonium chloride salt are needed for a demonstration of the sublimation of substances like ammonium chloride. The way to do this project is to take some ammonium chloride salt and gently crush it in a china dish. Now place an upside-down or inverted funnel over the china dish, covering it with its wide face and its stem at the top. Use a cotton stopper to now seal the funnel's stem opening. Place this set-up over the stove and begin slowly warming the ceramic dish. The result of this action is that the ammonium chloride salt sublimates because heating causes the solid crystals of ammonium chloride to immediately transition to their gaseous state and there is also no liquid state is seen.

So, using this activity, we can show how ammonium chloride sublimates.

Conclusion:

The process of sublimation is endothermic. Deposition is the opposite of sublimation or the transition from a vapour to a solid state. Unlike a chemical reaction, sublimation is a physical process.

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