Question about vapor pressure

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Hello everyone, before I start I just want to mention that I am not an expert in physics whatsoever, so please be as specific as you can get if you wish to provide an answer. (The question itself might be considered stupid to be honest)

I read the definition of the boiling point recently and according to wikipedia, boiling point is the temperature at which the vapor pressure equals the pressure surrounding the liquid. So my question is, what exactly is the pressure surrounding the liquid? For example we have a pot filled with water in room conditions (20C, 1 atm pressure). What is the value of the pressure surrounding the liquid at such conditions? If we warm up the pot and vapor starts getting generated, will that also increase the atmospheric pressure within the room as well?

In case of a pressurized container or cargo tank, what is again the pressure surrounding the liquid? At boiling point, the vapor pressure generated will double the pressure within the tank?

Thanks for your time in advance if you take the time to reply. It would be super helpful.
 

Answers and Replies

  • #2
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what exactly is the pressure surrounding the liquid?
1 atm
will that also increase the atmospheric pressure within the room as well?
Only if the room is unvented.
pressurized container or cargo tank, what is again the pressure surrounding the liquid?
Whatever the pressure happens to be; presumably the tank is closed/sealed, and may be regarded as a "system."
 
  • #3
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In case of a pressurized container or cargo tank, what is again the pressure surrounding the liquid? At boiling point, the vapor pressure generated will double the pressure within the tank?
It depends on whether air is in the tank to start with. Also, in a closed tank with air, the boiling point will be increasing as the temperature rises (and you continue to add heat).
 

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