Re: PV=nRT - Saab General Bulletin Board - Saabnet.com
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Re: PV=nRT
Posted by Erik919kt [Email] (more from Erik919kt) on Mon, 26 Jan 2015 08:03:49
In Reply to: PV=nRT, Snowmobile [Profile/Gallery]
, Sun, 25 Jan 2015 14:02:47
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PV=nRT uses Kelvin for the units of temperature, not Celcius. Add 273.15 to your degrees Celcius temp to get Kelvin. Trivia: we don't say degrees Kelvin, for some reason, just Kelvin.
If the balls were inflated at 25 degrees Celcius (298 Kelvin), and then it was zero degrees C on the field of play (273 Kelvin), then, assuming that the volume inside the football is constant, the pressure would decrease by 8% (298-273/298). If the initial pressure was 13 psi, then the pressure would drop by 1.1 psi upon cooling to 273K.
Posts in this Thread:
- Deflated Footballs, No Snaab, Sun, 25 Jan 2015 05:05:05
- Hello, NFL, anybody home?, AeroEd, Fri, 30 Jan 2015 09:41:52
- Much ado about nothing, EGD , Mon, 26 Jan 2015 01:56:20
- Me too, SWEDECAR , Sun, 25 Jan 2015 13:21:28
- Re: Me too, Snowmobile , Sun, 25 Jan 2015 14:04:41
- My questions too, and why I no longer watch...., MI-Roger , Sun, 25 Jan 2015 05:31:45
- Re: My questions too, and why I no longer watch...., dtechakacheaptech, Mon, 26 Jan 2015 10:13:46
- Re: My questions too, and why I no longer watch...., AdamSAAB2kAero , Sun, 25 Jan 2015 14:56:50
- It may all come down to the change of temperature, Ron, Sun, 25 Jan 2015 08:02:17
- PV=nRT, Snowmobile , Sun, 25 Jan 2015 14:02:47
- Re: PV=nRT, Erik919kt, Mon, 26 Jan 2015 08:03:49 <-- Viewing This Message
- Re: PV=nRT, Snowmobile , Mon, 26 Jan 2015 09:50:18
- Re: It may all come down to the change of temperature, seth1065 , Sun, 25 Jan 2015 08:34:08
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