Temp water boils

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...

 

[KillaMarcilla]

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

 

[enigma]

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.