Carbon Vapor and Gaseous Carbon

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    Carbon Vapor
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SUMMARY

Maintaining pure carbon gas at room temperature is not feasible. The discussion confirms that gaseous carbon cannot exist stably at room temperature due to its tendency to condense into solid graphite as temperature decreases. The vapor phase of carbon does not exist at any pressure at room temperature, and evacuation only reduces the sublimation temperature from approximately 5500K to around 4000K. For further understanding, users are encouraged to consult a phase diagram for carbon.

PREREQUISITES
  • Understanding of phase diagrams, specifically for carbon.
  • Knowledge of the properties of gaseous and solid carbon.
  • Familiarity with thermodynamics and temperature-pressure relationships.
  • Basic principles of vacuum systems and their effects on material states.
NEXT STEPS
  • Research carbon phase diagrams to visualize the states of carbon at various temperatures and pressures.
  • Study the thermodynamic properties of carbon to understand its behavior under different conditions.
  • Explore the concept of sublimation and its relevance to carbon at high temperatures.
  • Investigate vacuum technology and its applications in material science.
USEFUL FOR

Researchers in material science, chemists studying carbon compounds, and engineers working with high-temperature applications will benefit from this discussion.

parlous
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Is it possible to maintain pure carbon gas at room temperature? Suppose I start with a vacuum chamber and allow a small amount of hot, gaseous carbon vapor inside it, but only enough so that it remains gaseous at normal room temperatures - is that possible to do? Where can I find formulas to let me know how much volume of vacuum space is needed and how many carbon atoms it can contain and still be gaseous @ room temperatures?

Thanks,
Parlous
 
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No, it's not possible to have (stable) gaseous (or even liquid) carbon at room temp.

Your above described approach will not work. As the temperature drops (and with it the kinetic energy of the gas molecules), the molecules will eventually condense into solid graphite...even at absolute vacuum.

Look up a phase digram for carbon. http://phycomp.technion.ac.il/~anastasy/teza/teza/node5.html

The vapor phase does not exist at any pressure at room temperature. Evacuation only lowers the sublimation temerature from about 5500K to about 4000K.
 

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