Question

spirit kept open in a watch glass disappears after some time which among the following phenomena are responsible for this​

Answer 1

Answer:

A watch glass is a circular concave piece of glass used in chemistry as a surface to evaporate a liquid, to hold solids while being weighed, for heating a small amount of substance and as a cover for a beaker. The latter use is generally applied to prevent dust or other particles entering the beaker; the watch glass does not completely seal the beaker, so gas exchanges still occur. When used as an evaporation surface, a watch glass allows closer observation of precipitates or crystallization, and can be placed on a surface of contrasting color to improve the visibility overall. Watch glasses are also sometimes used to cover a glass of whisky, to concentrate the aromas in the glass, and to prevent spills when the whisky is swirled...

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Answer 2

spirit kept open in a watch glass disappears after some time which among the following phenomena are responsible for this is vapourisation

Explanation:

• Vapourisation is the conversion of a liquid to gaseous state increase of certain liquids the vaporization point is very low.

• As a result of this they turn into vapour if an at room temperature  spirit when kept without mixing with water has very low vaporization point. Hence it gets converted into colorless gases and it seems to have disappeared after sometime. in case of naphthalene the phenomena which is responsible is known as sublimation

To know more about sublimation,

What is sublimation.With the help of an activity describe the ...

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