How to calculate pressure increase from expanding gas
How to calculate pressure increase from expanding gas
(OP)
It has been over 20 years since I studied Thermo. I am trying to run safety calculations on a pressure vessel. The PV contains batteries than may generate gas under certain conditions. I know the size of the PV and the volume of gas generated by the batteries.
How do I determine the change in pressure inside of the PV? The phyical size of the chamber does not change so Boyle's Laws do not fit (P1V1=P2V2) because V1 = V2.
The problem sounds easy ie the volume of gas inside of the cylinder increases by say 100 cu in so what is the new pressure? What are the governing equations?
How do I determine the change in pressure inside of the PV? The phyical size of the chamber does not change so Boyle's Laws do not fit (P1V1=P2V2) because V1 = V2.
The problem sounds easy ie the volume of gas inside of the cylinder increases by say 100 cu in so what is the new pressure? What are the governing equations?





RE: How to calculate pressure increase from expanding gas
You are creating gas that wasn't there before, the number of moles of gas is not constant.
P1V1/T1n1 = P2V2/T2n2
RE: How to calculate pressure increase from expanding gas
P2 = Psl*(Vt+Vg)/Vt
RE: How to calculate pressure increase from expanding gas
Can I assume you meant to type: P2 = P1*(Vt+Vg)/Vt
RE: How to calculate pressure increase from expanding gas