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

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Discussion Overview

The discussion revolves around the concept of degrees of freedom within the vapor dome during the boiling of water, specifically focusing on the application of the phase rule and the properties needed to define states within the dome.

Discussion Character

  • Technical explanation, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant inquires about the degree of freedom inside the vapor dome and at the saturated points during boiling.
  • Another participant suggests that the phase rule may be relevant to the inquiry.
  • A participant expresses confusion about why the degree of freedom is considered to be 1 in the wet region, noting that two properties (such as pressure and dryness fraction) seem necessary to define a state within the dome.
  • There is a question regarding the number of components involved in the system, with a participant asserting that there is only 1 component.
  • Another participant questions whether the system is at equilibrium.

Areas of Agreement / Disagreement

Participants appear to have differing views on the application of the phase rule and the definition of states within the vapor dome, indicating that the discussion remains unresolved.

Contextual Notes

There are unresolved questions regarding the assumptions behind the degree of freedom and the definitions of properties necessary to describe states within the vapor dome.

Who May Find This Useful

Individuals interested in thermodynamics, phase transitions, and the application of the phase rule in physical systems may find this discussion relevant.

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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