What is dry ice made off?

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Offline The Scientist

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What is dry ice made off?
« on: 26/09/2010 15:58:17 »
Can anyone please tell me in specifics what dry ice is really made off, I have a vague knowledge that dry ice is the solid state for carbon dioxide. What gives off the 'gas' and anyone be more specific than that? Thanks!
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Offline lightarrow

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What is dry ice made off?
« Reply #1 on: 26/09/2010 19:51:55 »
It is, solid CO2. It sublimates so when heated passes from solid to vapour directly.

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Offline tommya300

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What is dry ice made off?
« Reply #2 on: 26/09/2010 22:53:52 »
Can anyone please tell me in specifics what dry ice is really made off, I have a vague knowledge that dry ice is the solid state for carbon dioxide. What gives off the 'gas' and anyone be more specific than that? Thanks!

"Carbon dioxide has no liquid state at pressures below 5.1 atmospheres. At 1 atmosphere (near mean sea level pressure), the gas deposits directly to a solid at temperatures below −78 C (−108 F; 195.1 K) and the solid sublimes directly to a gas above −78 C. In its solid state, carbon dioxide is commonly called dry ice."

http://en.wikipedia.org/wiki/Carbon_dioxide