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Carbon dioxide is first a tri-atomic | '''Carbon dioxide''' is formed by the complete combustion of carbon or compounds of carbon (principally the hydrocarbons). It is a [[greenhouse gas]]. | ||
== Chemistry == | |||
Carbon dioxide is first a tri-atomic molecule {one atom of carbon and two of oxygen, yet it is not usually known as such}. Carbon dioxide is a compound (that is to say a Substance that is made up from more than one type of atom). | |||
Carbon dioxide [CO2] is chemically represented as O=C=O [O double bond C double bond O]. | Carbon dioxide [CO2] is chemically represented as O=C=O [O double bond C double bond O]. | ||
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Oxygen needs to make and share two covalent chemical bonds to 'be Happy'; Carbon needs to make four. This is to help explain the molecular formula O=C=O. | Oxygen needs to make and share two covalent chemical bonds to 'be Happy'; Carbon needs to make four. This is to help explain the molecular formula O=C=O. | ||
It is also produced by the reaction of carbonates or hydrogen carbonates with acids, and by heating carbonates [without Water]. | |||
Plants convert atmospheric CO2 and water vapor into carbohydrates - photosynthesis needs both Chlorophyll and Sunlight. | |||
CO2 is moderately soluble in | Chemical double bonds occur in many instances, starting with H2C=CH2 [ethylene] and O=C=O. | ||
== Behavior == | |||
CO2 is moderately soluble in water; it is the acid-anhydride of carbonic acid. In other words, solutions of carbon dioxide are acidic. Carbon dioxide reacts with water to form carbonic acid, H2CO3; however the reaction is not complete - most of the carbon dioxide exists in solution as CO2 molecules. | |||
The phase [solid/liquid/gas/plasma phases] diagram for CO2 shows that at one Atmosphere [1 atm] of pressure CO2 has a freezing point temperature of -78.5 degrees C. CO2 like most substances contracts upon freezing. | The phase [solid/liquid/gas/plasma phases] diagram for CO2 shows that at one Atmosphere [1 atm] of pressure CO2 has a freezing point temperature of -78.5 degrees C. CO2 like most substances contracts upon freezing. | ||
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The phase diagram also shows that The Triple Point of CO2 [where solid, liquid and gaseous States (phases) may co-exist] 'occurs' at 5.11 atm and at -56.6 degrees C. In this case, this means that CO2 cannot be a Liquid below 5.11 atm. | The phase diagram also shows that The Triple Point of CO2 [where solid, liquid and gaseous States (phases) may co-exist] 'occurs' at 5.11 atm and at -56.6 degrees C. In this case, this means that CO2 cannot be a Liquid below 5.11 atm. | ||
== Climate change and CO<sub>2</sub> == | |||
There are other chemical atmospheric discharges that are more actively greenhouse gases than carbon, yet the effects of these are 'side-lined' when put up against our incessantly increasing deposition of CO2 - both gaseous and solid {SOOT} - into Our One and Only Paper Thin Atmosphere. | |||
[[Category:Chemical substances]] | [[Category:Chemical substances]] | ||
[[Category:Climate change]] | [[Category:Climate change]] | ||
Revision as of 07:19, 18 January 2012
Carbon dioxide is formed by the complete combustion of carbon or compounds of carbon (principally the hydrocarbons). It is a greenhouse gas.
Chemistry
Carbon dioxide is first a tri-atomic molecule {one atom of carbon and two of oxygen, yet it is not usually known as such}. Carbon dioxide is a compound (that is to say a Substance that is made up from more than one type of atom).
Carbon dioxide [CO2] is chemically represented as O=C=O [O double bond C double bond O].
The molecule is linear and non-polar.
CO2 is made from two different types of Atoms - this is noted by the -ide suffix. In this case, diox- means two Oxygens.
Oxygen needs to make and share two covalent chemical bonds to 'be Happy'; Carbon needs to make four. This is to help explain the molecular formula O=C=O.
It is also produced by the reaction of carbonates or hydrogen carbonates with acids, and by heating carbonates [without Water].
Plants convert atmospheric CO2 and water vapor into carbohydrates - photosynthesis needs both Chlorophyll and Sunlight.
Chemical double bonds occur in many instances, starting with H2C=CH2 [ethylene] and O=C=O.
Behavior
CO2 is moderately soluble in water; it is the acid-anhydride of carbonic acid. In other words, solutions of carbon dioxide are acidic. Carbon dioxide reacts with water to form carbonic acid, H2CO3; however the reaction is not complete - most of the carbon dioxide exists in solution as CO2 molecules.
The phase [solid/liquid/gas/plasma phases] diagram for CO2 shows that at one Atmosphere [1 atm] of pressure CO2 has a freezing point temperature of -78.5 degrees C. CO2 like most substances contracts upon freezing.
However, upon thawing, CO2 sublimates - it trans-phases directly from Solid to Vapor.
The phase diagram also shows that The Triple Point of CO2 [where solid, liquid and gaseous States (phases) may co-exist] 'occurs' at 5.11 atm and at -56.6 degrees C. In this case, this means that CO2 cannot be a Liquid below 5.11 atm.
Climate change and CO2
There are other chemical atmospheric discharges that are more actively greenhouse gases than carbon, yet the effects of these are 'side-lined' when put up against our incessantly increasing deposition of CO2 - both gaseous and solid {SOOT} - into Our One and Only Paper Thin Atmosphere.