2007-11-04 14:22:06 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
When it's frozen it's called dry ice. It is solid like regular ice but a lot colder. When it "melts" it turns back into a gas, not a liquid.
2007-11-04 14:26:28 · answer #1 · answered by Jeff A 5 · 0⤊ 0⤋
Dry ice is a name given to carbon dioxide when it is at solid state. It sublimes meaning it doesn't melt, but rather evaporates from solid state to gasous state. The reason for this is because it is below it's own triple point, which is at -56.4 C and 5.11 atmospheres. So if the temperature and pressure is above the carbon dioxide triple point, it will no longer sublime but melt and turn to liquid state. For comparison, water's triple point is at .0098 C and 0.00603 atmospheres. So ice would sublime just like dry ice below it's triple point. Note: Normal Pressure is at 1 atmosphere, which is at sea level. And a triple point is where all three states of matter exist simultaneously.
2016-05-27 09:49:53 · answer #2 · answered by ? 3 · 0⤊ 0⤋
like ice, solid carbon dioxide is used to keep things cold
unlike "regular" ice, dry ice does not exist in the liquid state under ordinary conditions
hence the name "dry ice" (it also looks a little like "regular" ice
it goes directly from the solid to the gas state, a process known as sublimation
2007-11-04 14:27:57 · answer #3 · answered by chem geek 4 · 0⤊ 0⤋
Just common jargon. Wet ice was water, dry ice was CO2.
2007-11-04 14:28:47 · answer #4 · answered by cattbarf 7 · 0⤊ 0⤋
it is called ice because when people discovered it it was extremely cold
it can only be handled using proper safety measures
2007-11-04 14:26:48 · answer #5 · answered by maxmillion132000 2 · 0⤊ 0⤋
it doesn't melt. It sublimes
2007-11-04 14:25:14 · answer #6 · answered by kentchemistry.com 7 · 0⤊ 0⤋