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help with some gas's

Posted: Sat Feb 10, 2007 10:39 pm
by trae08
ok my chamber will be 12 inches long out of 4 in sch 40 pvc.

my question is i dunno how to find out volume. flame me al you want for that idc. but i am wanting to run my gun of a gas so i can shoot glow sticks into the ocean at night on the beach..

im going to be running this gun at about 110 psi with a modded sprinkler.
i want to know which tank would last longer and which one would be easier to fill.

and for those who might say watch out the cold co2 might cool your chamber and cause it to explode. im going to be running the gas into a steel tank then to my gun.


co2
* Easy Carry Handle
* 7" Diameter
* 27" Height
* 1800 PSI
* CGA-320 Valve
* Good for 15-18 Kegs

nitrogen
* 5.5" Diameter
* 18.5" Height
* 2216 PSI
* 153 BAR
* CGA-580 Valve

Posted: Sat Feb 10, 2007 10:42 pm
by paaiyan
75.36 cubic inches. The formula is pi(3.14) * R^2 * length. As for which tank owuld last longer, I'd have to know the volume of each. Find that out and I can tell you.

Posted: Sat Feb 10, 2007 11:14 pm
by SpudBlaster15
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Posted: Sat Feb 10, 2007 11:25 pm
by paaiyan
Eh, my bad. Stupid calculator didn't square the radius for me. I concede that point to spudblaster.

Posted: Sun Feb 11, 2007 12:27 pm
by boilingleadbath
...except that the CO2 is stored as a liquified gas, so the ideal gas law is nowhere near correct.

Do they tell you the weight of the CO2 that the CO2 tank holds?

Posted: Sun Feb 11, 2007 1:15 pm
by SpudBlaster15
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Posted: Sun Feb 11, 2007 2:13 pm
by paaiyan
You know, I'm a chemistry major, but I always did hate the gas laws. Maybe instead of arguing about all this, we should just suggest he go get a couple 20 oz CO2 canisters. I can guarantee that would last a good amount of time.

Posted: Sun Feb 11, 2007 2:58 pm
by SpudBlaster15
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Posted: Sun Feb 11, 2007 2:59 pm
by paaiyan
Well if we can get the weight of the contained gas when the canisters are full, it shouldn't be any problem. Then it's jsut a matter of comparing the molar masses of each.

Posted: Sun Feb 11, 2007 3:45 pm
by trae08
15 lb. Aluminum Co2 Tank. im not sure if thats the wieght of the co2 or the tank but thats all i can find out.. im thinking ill just go with co2 as it will be tons easier to fill also. thanks for all your help

Posted: Sun Feb 11, 2007 3:51 pm
by paaiyan
15 pounds?! Geez. I don't see why you went through all the trouble of asking us. That's a whole lot of CO2. Granted your gun is gonna use more than my paintball gun does but I put 800 rounds through my spyder TL-R before my 12 oz tank ran out. You'd have to be out for a long time to run that out I'd think.

Posted: Sun Feb 11, 2007 4:20 pm
by SpudBlaster15
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Posted: Sun Feb 11, 2007 4:22 pm
by paaiyan
Yea you go for all the stoichiometry. I'm tired of that crap. Spent so long on it in chem. Bleh. But there you go, a whole dagum day of potatoes.

Posted: Sun Feb 11, 2007 4:31 pm
by SpudBlaster15
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Posted: Sun Feb 11, 2007 4:50 pm
by paaiyan
Well that's high school chem, I'm in college. I used to be cool with it but we did so much gas law stoichiometry I hate it now. I still love chemistry but the gas laws, not so much.