At this temperature carbon dioxide is a solid.
Carbon Dioxide can be a solid, liquid or gas. At standard temperature and pressure, it is a gas.
liquid
The triple point of Carbon Dioxide is 216.58 K (-56.57 °C), 518.5 kPa (5.117197 atm) so pushing the pressure higher and the temperature lower shifts it solidly into the solid phase. Another way of checking it is to note that the vapor pressure of solid Carbon Dioxide at -60 °C is 4.043 atm so increasing the pressure to 15 atm would certainly push it further into the solid phase.
(Explanation): If you look at the phase diagram for CO2, and you draw a lines where the temperature and pressure meet, you will see that the point will be inside the zone that is 'solid', so it is in the solid state.
Nope. The pressure keeps the Carbon Dioxide dissolved in the liquid, and when that pressure is relieved, the CO2 rapidly returns to its gaseous state. None of the molecules are reacting or changing, although the CO2 switches from aqueous to gaseous phase.
In these conditions carbon dioxide is a gas.
Carbon Dioxide can be a solid, liquid or gas. At standard temperature and pressure, it is a gas.
solid, I just took the text on apex
It doesn't exactly "skip" the liquid phase, it's just that at normal atmospheric pressure there IS no liquid phase for carbon dioxide. At higher pressures, it is possible to liquefy carbon dioxide. There's no simplistic explanation for why the triple point pressure for carbon dioxide is higher than around 100 kPa, it just is.
liquid
It depends on the temperature and pressure of its surroundings. check out its phase diagram for more information. the phase diagram is available here... http://www21.wolframalpha.com/input/?i=carbon+dioxide
The triple point of Carbon Dioxide is 216.58 K (-56.57 °C), 518.5 kPa (5.117197 atm) so pushing the pressure higher and the temperature lower shifts it solidly into the solid phase. Another way of checking it is to note that the vapor pressure of solid Carbon Dioxide at -60 °C is 4.043 atm so increasing the pressure to 15 atm would certainly push it further into the solid phase.
Carbon dioxide is not energized into glucose during the Dark Phase.
The triple point of Carbon Dioxide is 216.55 K (−56.60 °C) and 517 kPa (5.10 atm). Since that puts the pressure (1 atm) below the triple point pressure (5.1 atm) we are only concerned with the where the solid/vapor equilibrium line falls relative to the temperature. At 1 atm, the sublimation temperature of Carbon Dioxide is -78.5 °C - considerably below -20 °C so that puts the Carbon Dioxide firmly in the vapor region of the phase diagram.
At normal atmospheric pressure, carbon dioxide goes directly from the solid phase to the gas phase without ever being a liquid in between. The technical term for this is "sublimation." It is possible to have liquid carbon dioxide at higher pressures, so strictly speaking it's not true to say that solid carbon dioxide can never melt ... it just doesn't happen at normal pressures.
Carbon dioxide goes straight from "dry ice" to gaseous carbon dioxide.
(Explanation): If you look at the phase diagram for CO2, and you draw a lines where the temperature and pressure meet, you will see that the point will be inside the zone that is 'solid', so it is in the solid state.