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Gary Gun
25-09-2009, 01:45 PM
What approximate level of Vacume is required to cause water to boil at 0.0oc ?

i have an f gas course to go on but first i must fill out some sort of pre test ? please Help !!

Im thinking below 2 torr
Sandro Baptista
25-09-2009, 02:37 PM
0,6108 kPa » 6,108E-3 bar » 6,108 mbar
sedgy
25-09-2009, 03:36 PM
hi sandro,

is this why its imposible to make a cup of tea at the top of mount everest?
Sandro Baptista
28-09-2009, 10:03 AM
hi sandro,

is this why its imposible to make a cup of tea at the top of mount everest?


Mount Everest is about 9.000 m? For this altitude the absolute pressure is about 0,3 bar » saturated temperature is about 70șC (start of water boiling).
coolstuf
28-09-2009, 09:30 PM
Hi Gary,

That sounds like a trick question. Water will freeze at 0, which will make vac system very hard. Make sure pipework is above 0 when pulling a vac, the warmer the system/pipework the better.
sedgy
05-10-2009, 07:24 PM
well done coolstuf, you follow the drift well
or blow heated ofn through the system the warm it up