Water vapor below 100 degrees?

  • #1
hi all
My question is: In a pressurized (close to 1.1 atm; B.P. 109 degrees), closed system of water mixed (in a ratio of 1000 lts to 20lts) with Boron Nitrite (yes I am talking about cooling water system for automobiles) where the temp of the mixture does not exceed 96 degrees Celsius; will the water turn into gaseous vapor? If so why? please explain
 

Answers and Replies

  • #2
cjl
Science Advisor
1,864
437
That depends entirely on whether there is any headspace in the closed system or not. If there is, some quantity of the water will turn to vapor until the vapor pressure in the headspace is at the equilibrium vapor pressure. If there is no headspace (the system is filled to the brim with liquid and then sealed), I would not expect there to be any water vapor at all.
 
  • #3
QuantumPion
Science Advisor
Gold Member
902
42
If you are talking about heat exchangers then yes you could have nucleate boiling.
 
  • #4
That depends entirely on whether there is any headspace in the closed system or not. If there is, some quantity of the water will turn to vapor until the vapor pressure in the headspace is at the equilibrium vapor pressure. If there is no headspace (the system is filled to the brim with liquid and then sealed), I would not expect there to be any water vapor at all.
hey cjl; thnx for the reply,
yes there is headspace, though the system is pressurised, there are voids (unavoidable), and room for collecting gases in the system and sent to expansion tanks. Kindly give me a reference where i can read about this vapor pressure and the equilibrium at depth.
thnx again.
 

Related Threads on Water vapor below 100 degrees?

  • Last Post
2
Replies
27
Views
25K
Replies
1
Views
992
Replies
1
Views
13K
Replies
7
Views
6K
Replies
1
Views
2K
Replies
2
Views
702
Replies
2
Views
3K
  • Last Post
Replies
16
Views
2K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
1
Views
15K
Top