Dear all,

if we assume that I have the below pressures:

p1= known, V1=known

p2=known---------->V2?

p3=known--------->V3?

p4=known-----------> V3?

(pressures are in barg and volume are in m3)

How I can really solve this very simple problem? Do I need to consider the standard conditions?

Let me a bit more clear:

I start with the known values p1, V1 (which is also the volume of the vessel)

NV2=(P2+1,101325)*V1/1,01325 (NV2 is normal volume)

NV3=(P3+1,101325)*V1/1,101325 (NV3 is normal volume)

Is this approach correct?

Is it correct to consider that the volume of air every time will be the volume of the container. And that the normal volume of air changes?

**Edited by panagiotis, 05 March 2022 - 05:31 AM.**