Siteadmin, Check users, nsTeam1RO, nsTeam1RW, nsTeam1_talkRO, nsTeam1_talkRW, oversight, Administrators
30,650
edits
Changes
Jump to navigation
Jump to search
Line 10:
Line 10: + + − At room temperature and atmospheric [[pressure]], carbon dioxide is a gas. It becomes solid at -78 ºC at standard atmospheric pressure, forming [[dry ice]]. When it thaws, it turns directly into a gas again (called [[sublimation]]). <ref>"Dry ice is frozen carbon dioxide. A block of dry ice has a surface temperature of -109.3 degrees Fahrenheit (-78.5 degrees C). Dry ice also has the very nice feature of sublimation -- as it breaks down, it turns directly into carbon dioxide gas rather than a liquid." [http://www.howstuffworks.com/question264.htm How Stuff Works] </ref> This can be seen from the phase diagram to the right, where at 1 atmosphere of pressure, there is no liquid state separating the solid and gas as temperature rises.+ − CO<sub>2</sub> is one of the [[greenhouse gas]]es. Heat-trapping by CO<sub>2</sub> has been observed on [[Earth]] and [[Venus]]. The extent of its role in the current increase in average global temperatures is a topic of active political and scientific debate. Rising CO<sub>2</sub> levels in the atmosphere have been observed to promote acidification of the oceans, through CO<sub>2</sub> + H<sub>2</sub>O => H2CO3 − − ==Carbon Dioxide and Atmospheric Temperature==
move down greenhouse gas - put in quotes because it's a metaphor
The [[Lewis structure]] indicates it has two double bonds,
The [[Lewis structure]] indicates it has two double bonds,
At room temperature and atmospheric [[pressure]], carbon dioxide is a gas. It becomes solid at -78 ºC at standard atmospheric pressure, forming [[dry ice]]. When it thaws, it turns directly into a gas again (called [[sublimation]]). <ref>"Dry ice is frozen carbon dioxide. A block of dry ice has a surface temperature of -109.3 degrees Fahrenheit (-78.5 degrees C). Dry ice also has the very nice feature of sublimation -- as it breaks down, it turns directly into carbon dioxide gas rather than a liquid." [http://www.howstuffworks.com/question264.htm How Stuff Works] </ref> This can be seen from the phase diagram to the right, where at 1 atmosphere of pressure, there is no liquid state separating the solid and gas as temperature rises.
==Carbon Dioxide and Atmospheric Temperature==
CO<sub>2</sub> is one of the "[[greenhouse gas]]es". Heat-trapping by CO<sub>2</sub> has been observed on [[Earth]] and [[Venus]]. The extent of its role in the current increase in average global temperatures is a topic of active political and scientific debate. Rising CO<sub>2</sub> levels in the atmosphere have been observed to promote acidification of the oceans, through CO<sub>2</sub> + H<sub>2</sub>O => H2CO3
[[Environmentalist]]s predict catastrophic [[global warming]] scenarios at the hands of excessive CO<sub>2</sub> released by industrial and commercial activities. The theory arguing against the greenhouse effect is that, the planet naturally gives off carbon dioxide, from natural sources such as volcanoes, and thus, it is not so bad for the Earth.
[[Environmentalist]]s predict catastrophic [[global warming]] scenarios at the hands of excessive CO<sub>2</sub> released by industrial and commercial activities. The theory arguing against the greenhouse effect is that, the planet naturally gives off carbon dioxide, from natural sources such as volcanoes, and thus, it is not so bad for the Earth.