On Sat, Aug 8, 2015 at 2:10 PM, John Dom <johndom@xxxxxxxxx> wrote:
H = m*Cp*T
T initial and T final of the expansion cooling are not the same only m is.
Isenthalpic?
Jd
*From:* arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx]
*On Behalf Of *David Gregory
*Sent:* zaterdag 8 augustus 2015 16:29
*To:* arocket@xxxxxxxxxxxxx
*Subject:* [AR] Re: CO2
The process is isenthalpic, so you know the final enthalpy and density.
Look up P and T on the NIST webbook.
On Fri, Aug 7, 2015 at 10:11 AM, John Dom <johndom@xxxxxxxxx> wrote:
· 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