Timeline for How to calculate air tank capacity from tank displacement, tank fill (gauge) pressure, and specific type of gas?
Current License: CC BY-SA 3.0
15 events
| when toggle format | what | by | license | comment | |
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| Dec 31, 2015 at 8:18 | history | rollback | Martin - マーチン♦ |
Rollback to Revision 1
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| Dec 31, 2015 at 8:12 | comment | added | Martin - マーチン♦ | Changing the question after there have be answers given is a big NO-NO. You can always ask a new question on this site. I am currently researching if a rollback is necessary and would not invalidate the answers given further. Note: This still is a homework question. You can inform yourself about this site when you take the tour. | |
| Dec 29, 2015 at 1:34 | history | edited | Special K | CC BY-SA 3.0 |
Needed to re-ask question due to requirements changes from the client.
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| Dec 22, 2015 at 13:23 | comment | added | Chet Miller | The compressibility factor (z factor) for carbon dioxide under the conditions in the tank is about 0.35. So the ideal gas law will not be accurate enough for CO2. You should use PV=znRT, with z = 0.35 for inside the tank. | |
| Dec 16, 2015 at 22:49 | comment | added | Special K | @Mithoron Thank you for the tip. Next time I'll be sure to show exactly what I've tried in order to provide a better picture of where things went wrong. | |
| Dec 16, 2015 at 22:43 | vote | accept | Special K | ||
| Dec 29, 2015 at 1:34 | |||||
| Dec 16, 2015 at 20:08 | answer | added | MaxW | timeline score: 4 | |
| Dec 16, 2015 at 17:31 | comment | added | MaxW | Is air rifle a Air Arms S200? // Helium would give much greater velocity to pellet, but it is a small molecule and leaks would be much more likely. In other words a rifle that holds air fine might leak helium. | |
| Dec 16, 2015 at 16:58 | comment | added | Special K | @MaxW How do the inputs above plug into the Ideal Gas Law? P = Tank Fill Pressure V = Tank Displacement n = # moles = mass of specific gas / molar mass R = Specific gas constant T = Temperature Where I'm getting confused is how there is only one Volume in the equation. If I'm given Tank Displacement (as volume), how can I solve for Tank Capacity (as volume)? | |
| Dec 16, 2015 at 0:59 | answer | added | A.K. | timeline score: 2 | |
| Dec 16, 2015 at 0:58 | comment | added | MaxW | The gist is that the "cubic feet" is measured at standard temperature and pressure and then pumped into the smaller volume under pressure. | |
| Dec 16, 2015 at 0:51 | comment | added | MaxW | Well for Carbon Dioxide, Nitrogen, and Helium you can assume that the ideal gas law works and it will be "reasonably close" $$PV = nRT$$ Dry air is a bit funny in that it is a mixture of gases. You should be able to find the mass of a liter of dry air at some combination of T,V and P. 22.4 liters would be a "mole" of air. | |
| Dec 16, 2015 at 0:26 | comment | added | Mithoron | Welcome to Chemistry SE! You should still put some of your calculations, so we can see what was wrong. | |
| Dec 15, 2015 at 23:46 | review | First posts | |||
| Dec 16, 2015 at 0:26 | |||||
| Dec 15, 2015 at 23:44 | history | asked | Special K | CC BY-SA 3.0 |