What is the atmospheric pressure of helium ?
When using Boyles law calculator http://www.endmemo.com/chem/boyle.php it is required that we know the atmospheric pressure of helium ?
By calculating the volumes of pressurized helium within following cylinders I have found the atmospheric pressure to be approximately 1.47 Bar.
Cylinder 1
150cm x 11.5cm Radius - contains .0035m3 of helium @ 200 Bar therefore the initial volume should be 1.37 Bar
Cylinder 2
33cm x 5cm Radius - Contains .0025m3 of helium @200 Bar therefore the initial volume should be 1.42 Bar
Cylinder 3
91cm x 7cm Radius - Contains .0149m3 of helium @200 Bar therefore the initial volume should be 1.64 Bar
Is this correct ?
