Explain sublimation with the help of an activity
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Sublimation is the process in which solids get directly converted to gases without changing to liquid or vice versa. For example, see the following activity:
1.Take a china dish and put an put few pieces of ammonium chloride.
2.put an inverted funnel on it and Insert a cotton plug at the narrow opening of the funnel.
3.now put this arrangement on a tripod stand and heat it uniformly.
4.after some time you will see that the ammonium chloride will sublime and form solid again on the sides of the inverted funnel.
So this activity proves sublimation of ammonium chloride.
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What is Sublimation
Fill your ice cube trays with water, place them in the freezer, and the next day, you will have ice cubes formed through a process called freezing. If you drop those ice cubes on the floor, soon they will have melted into a puddle of water. Freezing and melting are two common phase transitions, or changes in the states of matter to or from solid, liquid, gas, or plasma.
Sublimation is another one of these phase transitions; except in this case, we have a solid turning directly into a gas. As a sublimating material changes from a solid to a gas, it never passes through the liquid state. This image shows water in its three forms: ice, water, and steam. Sublimation is just one of the ways water or another substance can change between its potential phases.
How Sublimation Works
Substances such as water and carbon dioxide (CO2) can be charted on a pressure versus temperature plot to reveal their state of matter (solid, liquid, or gas) at a given temperature and pressure. At a typical atmospheric pressure, we know that water is a solid at temperatures below 0 degrees Celsius, a liquid from 0 to 100 degrees Celsius, and a gas at higher temperatures. Atmospheric pressure, however, can change, particularly with altitude. Higher altitudes yield lower atmospheric pressures.
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Fill your ice cube trays with water, place them in the freezer, and the next day, you will have ice cubes formed through a process called freezing. If you drop those ice cubes on the floor, soon they will have melted into a puddle of water. Freezing and melting are two common phase transitions, or changes in the states of matter to or from solid, liquid, gas, or plasma.
Sublimation is another one of these phase transitions; except in this case, we have a solid turning directly into a gas. As a sublimating material changes from a solid to a gas, it never passes through the liquid state. This image shows water in its three forms: ice, water, and steam. Sublimation is just one of the ways water or another substance can change between its potential phases.
How Sublimation Works
Substances such as water and carbon dioxide (CO2) can be charted on a pressure versus temperature plot to reveal their state of matter (solid, liquid, or gas) at a given temperature and pressure. At a typical atmospheric pressure, we know that water is a solid at temperatures below 0 degrees Celsius, a liquid from 0 to 100 degrees Celsius, and a gas at higher temperatures. Atmospheric pressure, however, can change, particularly with altitude. Higher altitudes yield lower atmospheric pressures.
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