With the help of labelled diagram describe in brief an activity to show sublimation process
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( The diagram below shows the experiement set-up to study the sublimation of Ammonium chloride ).
Sublimation : The change of a solid directly into vapour on heating and of vapour into solid on cooling is known as sublimation.
‹‹‹ Demonstration of Sublimation ›››
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let us demonstrate the sublimation by taking the example of Ammonium chloride.
In China dish , Take a Small amount of the Substance. The dish is covered by a perforated sheet. A glass funnel in the inverted position is placed over the dish so as to cover it. The steam of the funnel is plugged with cotton. The dish is heated from below.
As a result, ammonium chloride undergoes sublimation i.e :- it changes into vapours which pass through the holes or perforations of the perforated sheet. The vapours get cooled in the upper portion of the funnel and change to the solid form. The latter gets deposited on the inner walls of the funnel and can be suitably removed later on. The cotton plug does not allow any vapours of the Substance to escape.
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BEST OF LUCK ;-)
#akashmandal.
Sublimation : The change of a solid directly into vapour on heating and of vapour into solid on cooling is known as sublimation.
‹‹‹ Demonstration of Sublimation ›››
--------------------------------------------------
let us demonstrate the sublimation by taking the example of Ammonium chloride.
In China dish , Take a Small amount of the Substance. The dish is covered by a perforated sheet. A glass funnel in the inverted position is placed over the dish so as to cover it. The steam of the funnel is plugged with cotton. The dish is heated from below.
As a result, ammonium chloride undergoes sublimation i.e :- it changes into vapours which pass through the holes or perforations of the perforated sheet. The vapours get cooled in the upper portion of the funnel and change to the solid form. The latter gets deposited on the inner walls of the funnel and can be suitably removed later on. The cotton plug does not allow any vapours of the Substance to escape.
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-----------------------------------------------------
BEST OF LUCK ;-)
#akashmandal.
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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.
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