[AR] Re: arocket Digest V3 #176
- From: "John Dom" <johndom@xxxxxxxxx>
- To: <arocket@xxxxxxxxxxxxx>
- Date: Sat, 8 Aug 2015 17:46:26 +0200
Not cold enough for the saturated gas above the liquid in the cartridge to
drive pellets in CO2 guns or cannons. Used in trench mortars since 1914-18.
jd
From: arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx] On
Behalf Of Thad Beier
Sent: zaterdag 8 augustus 2015 17:36
To: arocket@xxxxxxxxxxxxx
Subject: [AR] Re: arocket Digest V3 #176
· If I flash expand the 8 g liquid/gaseous CO2 in an evacuated 1 L
bottle by puncturing the cartridge (cartridge and bottle at 20°C prior to
the expansion) what will the gas temperature and pressure be in the bottle?
I don't think you will get 'gas' out of that. The latent heat of evaporation
of CO2 is 574J/g, and the specific heat is on the order of .85 J/gK, so it's
going to be very cold indeed. It's going to be snowing in the bottle.
Thad
On Fri, Aug 7, 2015 at 10:08 PM, FreeLists Mailing List Manager
<ecartis@xxxxxxxxxxxxx> wrote:
arocket Digest Fri, 07 Aug 2015 Volume: 03 Issue: 176
In This Issue:
[AR] CO2
----------------------------------------------------------------------
From: "John Dom" <johndom@xxxxxxxxx>
Subject: [AR] CO2
Date: Fri, 7 Aug 2015 19:11:31 +0200
· If I flash expand the 8 g liquid/gaseous CO2 in an evacuated 1 L
bottle by puncturing the cartridge (cartridge and bottle at 20°C prior to
the expansion) what will the gas temperature and pressure be in the bottle?
· If I flash expand the 8 g of CO2 in a cartridge in 1 L of water
(cartridge and water at 20°C prior to expansion) in a 1.2 L bottle, how much
will the 1 L water (now soda) temperature drop in °C immediately after?
Next, what will the ullage gas CO2 pressure be immediately after and after
it heating up to 20°C again?
My 3rd question depends on the response I get.
Thanks,
jd
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End of arocket Digest V3 #176
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Thad Beier
thadbeier@xxxxxxxxx
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