Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Temp water boils

  1. May 19, 2003 #1
    What temperature will water boils on top of Mt. Kilamanjaro (elevation 5895m)..........


    This answer should be 80.3 degree celsius...How did they get this...?
    I have my thermo and fliud tables but I cannot seems to figure this one...

    Thanks...
     
  2. jcsd
  3. May 21, 2003 #2
    Isn't the boiling point dependant on the pressure the liquid is under, since liquids boil when the tiny gas-bubbles that form all the time at random are pressurized enough to stay and grow, rather than being instantly crushed?

    I guess I'd just look that up on a table or a PVT diagram.. I hear that you need a gigantic messy system of equations to approximate water's state transitions, and everyone just uses tables
     
  4. May 21, 2003 #3

    enigma

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Standard altitude table says that at 5900m:

    p = 4.7867 E4 N/m^2

    Consulting a Saturated Water-Pressure table for 50kPa (closest value) gives 81.33 degrees C as saturation temperature.

    40kPa -> 75.87 C

    You can interpolate back from there.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook