Water Boiling Temperature on Mt. Kilimanjaro (5895m): The Science Behind It

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SUMMARY

At an elevation of 5895 meters on Mt. Kilimanjaro, water boils at approximately 80.3 degrees Celsius due to the significantly reduced atmospheric pressure. The boiling point is influenced by the pressure exerted on the liquid, which is calculated using standard altitude tables. At 5900 meters, the pressure is approximately 4.7867 E4 N/m², and consulting a Saturated Water-Pressure table reveals that the saturation temperature at 50 kPa is around 81.33 degrees Celsius. Interpolation methods can be applied to estimate boiling points at varying pressures.

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BEVIN
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...
 
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Isn't the boiling point dependent 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
 
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.
 

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