what holds more air?

[dirtydenn]

quick science question

what holds more air, and would hopefully last longer?

1.9l 3000psi or 1.5l 4500 psi bottles?

 

[Graeme]

i wouldn't get a 1.9lt they are huge mate.I would stick to 4500 unless you only fill off dive bottles or bulk air.

 

[mascot]

i thnk you will find he owns more than 1 of each

umm... i think it would be the 1,5 holding more...tho it would only be fractionally more

altho it is a quarter smaller it has 50% more pressure in it matey


or i could just be chatting ****e...

 

[Skeet]

Gonna work this out as I type and see what happens...right...so...the 1.9 has 400ml (as it were) more volume than the 1.5....now, say there's 100 litres of air in the 1.9 at 3000 psi...so the 1.9 holds 26% more air than a 1.5 at 3000psi.
So, the 1.5 holds 74 litres of air.
Now...seeing as the 1.5 stores at 4500psi, which is 50% more than the 1.9...the 1.5 can hold 112.5 litres of air.

Think that is right..dunno

 

[manike]

pv=nrt

So with everything else being constant.

1.9 X 3000 = 5700

1.5 X 4500 = 6750

The 1.5 at 4500 psi holds more air.

 

[Skeet]

{preassure x volume} = Net return??

 

[Tom Allen]

What holds more air........


Me after a tin of beans....

 

[manike]

We can define pressure P, volume V, and temperature T.

T is a measure of the average translational kinetic energy of the molecules of a gas. Since the number of moles, n, is proportional to the number of molecules, N, the product nT (or nRT or NT) is a measure of the sum of all the individual molecular kinetic energies. The products nRT and NT are fixed. Thus with everything else being equal we can just compare P X V.

 

[garycarrot]

Guys please drink more beer and work the answer out...1.5 or 1.9


Now I would say 1.5 at 4500psi would hold more.

????

 

[H]

Err....question has already been answered by clever boy Simon....

Originally posted by manike
pv=nrt

So with everything else being constant.

1.9 X 3000 = 5700

1.5 X 4500 = 6750

The 1.5 at 4500 psi holds more air.