When boiling water, what is the degree of freedom inside the vapour dome?

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SUMMARY

The discussion centers on the degree of freedom within the vapor dome of boiling water, specifically addressing why it is determined to be 1 in the wet region. Participants reference the Gibbs phase rule to explain this phenomenon, emphasizing that only one intensive property, such as pressure or dryness fraction, is necessary to define the state within the dome. The conversation clarifies that there is only one component involved, which is water, and that at equilibrium, the system's state can be defined using these properties.

PREREQUISITES
  • Understanding of the Gibbs phase rule
  • Knowledge of thermodynamic properties, specifically pressure and dryness fraction
  • Familiarity with the concept of vapor dome in phase transitions
  • Basic principles of equilibrium in thermodynamic systems
NEXT STEPS
  • Study the Gibbs phase rule in detail
  • Learn about the properties of saturated steam and liquid water
  • Explore the concept of dryness fraction and its applications
  • Investigate phase diagrams and their interpretation in thermodynamics
USEFUL FOR

This discussion is beneficial for students and professionals in thermodynamics, chemical engineering, and anyone interested in understanding phase transitions and the behavior of water in its various states.

Death eater
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When water converts to steam while boiling a vapour dome can be formed, what is the degree of freedom inside this vapour dome and on the saturated points?
 
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Are you asking about, or how to apply, the phase rule?
 
Bystander said:
Are you asking about, or how to apply, the phase rule?
Actually I wanted to understand why degree of freedom is 1 in the wet region ??
I know by the Gibbs formula it comes 1 but to locate certain point inside the dome we need to know two properties ( eg- pressure and dryness fraction) ?
How can we define the state by just one intensive property?
 
Death eater said:
dryness fraction
How many components?
 
Bystander said:
How many components?
There is only 1 component
 
Death eater said:
only 1 component
At equilibrium?
 

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