1 What are the effects of change in temperature and pressure on the state of matter ?
2 what is dry ice? how it is formed?
3 why do we see water droplets on the outer surface of a glass containing Ice cold water ?
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1.The increase in pressure changes the state of matter from gas to liquid and also from liquid to solid. But increase in pressure alone cannot change the state of matter. Every gases and liquid have certain temperature above which the application of pressure would not change the state of matter.
2.Dry ice, sometimes referred to as "cardice" (chiefly by British chemists), is the solid form of carbon dioxide. It is used primarily as a cooling agent. Its advantages include lower temperature than that of water ice and not leaving any residue (other than incidental frost from moisture in the atmosphere).
3.Sometimes we see water droplets on the outer surface of the glass containing ice-cold water this isbecause the water vapour presents in air, on coming in contact with the cold glass of water, loses energy and gets converted to liquid state, which we seeas water droplets.
2.Dry ice, sometimes referred to as "cardice" (chiefly by British chemists), is the solid form of carbon dioxide. It is used primarily as a cooling agent. Its advantages include lower temperature than that of water ice and not leaving any residue (other than incidental frost from moisture in the atmosphere).
3.Sometimes we see water droplets on the outer surface of the glass containing ice-cold water this isbecause the water vapour presents in air, on coming in contact with the cold glass of water, loses energy and gets converted to liquid state, which we seeas water droplets.
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