- #1
gematt7
- 4
- 0
you want to boil a pot of water at 110 C
diameter of pot = 15cm
atmospheric pressure 101 kPa
what weight lid should you use?
i looked up the steam tables and water boils at 110 C at 143.27 kPa
so do i use that pressure or 143.27-101? (gauge pressure)
i used gauge and got something like ~76.14 kg.. which seems ridiculous for a lid weight
formula i used:
force = mass x 9.81
force = pressure * area
mass x 9.81 = pressure * area
_____________________
similar question but area = 5mm^2, atmospheric pressure = 101.3 kPa, and you want it to boil at 120 C
i got an answer of 0.101kg using absolute pressure and 0.049kg using gauge pressure
could you verify my answer and tell me which pressure i should be using.. absolute pressure or gauge pressure
diameter of pot = 15cm
atmospheric pressure 101 kPa
what weight lid should you use?
i looked up the steam tables and water boils at 110 C at 143.27 kPa
so do i use that pressure or 143.27-101? (gauge pressure)
i used gauge and got something like ~76.14 kg.. which seems ridiculous for a lid weight
formula i used:
force = mass x 9.81
force = pressure * area
mass x 9.81 = pressure * area
_____________________
similar question but area = 5mm^2, atmospheric pressure = 101.3 kPa, and you want it to boil at 120 C
i got an answer of 0.101kg using absolute pressure and 0.049kg using gauge pressure
could you verify my answer and tell me which pressure i should be using.. absolute pressure or gauge pressure