Why is dry ice more effective in cooling purposes than ordinary ice
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Dry ice is made of solid carbon dioxide (CO2) while ice is made, of solid water. Dry ice" is made from frozen carbon dioxide gas. Carbon dioxide is an odd substance because at regular pressure, it is only found in gas and solid forms: the stuff in the air you breathe and dry ice. So when dry ice "melts" it goes directly into the gas form! At really high pressures, all substances have a freezing point which depends on their unique physical and chemical characteristics.
Most of the stuff we deal with on a daily basis is solid,meaning that it has a freezing point (transition from liquid to solid) that is higher than "room temperature," or about 20 degrees Celsius A lot of room temp. liquids, such as water, alcohol, and gasoline have freezing points below 20 C but, perhaps, not too far below 0 C.
Substances that are normally gases at 20 C and one atmosphere pressure, such as CO2, oxygen, and nitrogen,have much lower freezing points. The temperature of dry ice is around -80 C or 195 K (195 degrees above absolute zero). Oxygen, argon, and nitrogen freeze at around 65 K.
Neon and hydrogen freeze at 10 to 20 K. Normal helium, as it turns out, doesn't ever freeze exactly.
One interesting thing about dry ice is that carbon dioxide doesn't exist as a liquid at room temp. and one atmosphere pressure. So dry ice doesn't melt (hence it is "dry") but sublimates - meaning that the CO2 goes directly from solid to vapor as it absorbs heat. The CO2 cylinders that are used to put bubbles in soda are filled with liquid CO2 but have to be pressurized at around 17 atmospheres.
Most of the stuff we deal with on a daily basis is solid,meaning that it has a freezing point (transition from liquid to solid) that is higher than "room temperature," or about 20 degrees Celsius A lot of room temp. liquids, such as water, alcohol, and gasoline have freezing points below 20 C but, perhaps, not too far below 0 C.
Substances that are normally gases at 20 C and one atmosphere pressure, such as CO2, oxygen, and nitrogen,have much lower freezing points. The temperature of dry ice is around -80 C or 195 K (195 degrees above absolute zero). Oxygen, argon, and nitrogen freeze at around 65 K.
Neon and hydrogen freeze at 10 to 20 K. Normal helium, as it turns out, doesn't ever freeze exactly.
One interesting thing about dry ice is that carbon dioxide doesn't exist as a liquid at room temp. and one atmosphere pressure. So dry ice doesn't melt (hence it is "dry") but sublimates - meaning that the CO2 goes directly from solid to vapor as it absorbs heat. The CO2 cylinders that are used to put bubbles in soda are filled with liquid CO2 but have to be pressurized at around 17 atmospheres.
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as dry ice is make of carbon dioxide and it's freezing point is -109.3 degree Celsius rather than of normal which has 0 degree Celsius pls if satisfied mark brainliest
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