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What is the chemical name of dry ice. why is it called dry ice. Is dry ice is same as the ordinary ice?
Dry ice is solid carbon dioxide (CO2). It is called dry ice because it does not melt when it heats up, it goes directly from solid to gas. It is NOT the same as ordinary ice, which is of course, solid water. Dry ice is much colder than ordinary ice.
What is the chemical formula of dry ice and ordinary ice?
Dry ice is solid carbon dioxide. It has the chemical formula CO2. The correct formula for dry ice( cardice), which is solid carbon dioxide, is CO2.
Air is cooled and pressurised to liquefy it As it cools a solid separates What is the identity of this solid?
Two possibilities are ordinary ice and dry ice.
Why does dry ice evaporate faster than a regular ice cube?
Dry ice is frozen carbon dioxide, totally different from ordinary ice, which is frozen water. Dry ice is much colder than water ice, thus evaporates quicker at room temperature. DO NOT TOUCH DRY ICE! It can hurt you badly.
Where is the ice located on the moon?
There is no ice on the Moon because there is no water, the surface of the Moon is totally dry.
What physical change is skipped during the decomposition of dry ice?
Dry ice, the solid form of carbon dioxide, doesn't melt (turn into a liquid) under ordinary circumstances. It changes state directly from a solid into a gas. We term this change sublimation, and dry ice is said to sublime.
Why dry ice does not wet the surface on which it is kept?
The reason that dry ice does not wet the surface on which it is stored is because dry ice is not made of water, but instead it is made with Carbon Dioxide. Because of the state of matter CO2 is at room temperature, it goes directly from a solid to a gas in a process called sublimation. Because of this, it never passes through the intermediate liquid state, thus not leaving anything on the surface on which it is set.
How does water ice contrast from dry ice?
Both dry ice and ice have cold temperatures and are commonly used for freezing and cooling. Ice forms at 32°F while dry ice forms at minus 109.3°F. Water ice is created when water is exposed to very low temperatures while dry ice is frozen carbon dioxide. Their main difference however lies in the fact that regular water ice melts into liquid while dry ice sublimates directly from solid to gas. Simply put, dry ice is colder than regular water ice and does not have the liquid residue that regular water ice leaves when subjected to high temperatures. Check link below for more information on dry ice and dry ice makers.
What makes dry ice dry?
I assume you mean the sound dry ice can make if a flat piece of dry ice is forced onto a warm, smooth, non-porous surface, such as a knife blade or counter top. This happens because the dry ice is undergoing a phase change straight from a sold to a gas; the gas is trapped between the dry ice and the surface you are pressing it against, and it causes a vibration as it escapes that you hear as a squeak or a scream (this is the way all sounds are made, just vibrations propagating through the air to your ears). You will notice that the sound goes away once the surface you are holding against the dry ice cools off and stops accelerating the conversion of CO2 from a solid to a gas.
Why must you wipe dry ice before putting them into the warm water?
a smoother surface will make the dry ice erupt less violently its just safer to do it.. - i found this answer to yahoo answer
Why does a spoon rattle when placed on dry ice?
The spoon will almost always be warmer than the dry ice. As heat is transferred from the spoon to the ice, it will promote rapid sublimation of the dry ice it is contact with (sublimation = direct change from solid to gas). All that rapidly released gas moves the spoon out of the way - tilting it this way and that and bringing different parts of the spoon into contact with the surface of the dry ice - which then causes gas to be released from that part of the surface. The net effect is that the spoon rattles.
What makes dry ice scream?
I assume you mean the sound dry ice can make if a flat piece of dry ice is forced onto a warm, smooth, non-porous surface, such as a knife blade or counter top. This happens because the dry ice is undergoing a phase change straight from a sold to a gas; the gas is trapped between the dry ice and the surface you are pressing it against, and it causes a vibration as it escapes that you hear as a squeak or a scream (this is the way all sounds are made, just vibrations propagating through the air to your ears). You will notice that the sound goes away once the surface you are holding against the dry ice cools off and stops accelerating the conversion of CO2 from a solid to a gas.
