Roderick Posted March 3, 2011 Share Posted March 3, 2011 Could someone explain to me how I can calculate the expansion of CO2 from liquid to vapour? What I am looking for is a simple equation ie. 1kg liquid CO2 = X litres or m3 of gas. I am having an argument with a venue who won't allow the use of CO2 because they fear that everyone may suffocate if CO2 is released inside.Sad but true. Link to comment Share on other sites More sharing options...
kerry davies Posted March 3, 2011 Share Posted March 3, 2011 Crap at maths after tea-time, try this; http://www.uigi.com/co2_conv.html Link to comment Share on other sites More sharing options...
timd Posted March 3, 2011 Share Posted March 3, 2011 pV=nRT where p is the pressure in pascals, V is the volume in m^3, n is the number of moles of gas, R is the gas constant (8.3145 J /K /mol) and T is the temperature in kelvin. More complicated in that CO2 is denser than air, but it stands. Basically comes out as the volume of CO2 in m^3 is around 0.564 multiplied by the mass of CO2 in kg. Calculated for pressure of 1 bar and temperature of 298K Link to comment Share on other sites More sharing options...
Roderick Posted March 3, 2011 Author Share Posted March 3, 2011 Thanks Tim, that was exactly what I needed. And thank you Kerrie, but that is exactly the sort of calculator that confuses the bejezus out of me :unsure: Because, as you would expect, all the information I have is metric and in different units; bar vs pa, Celsius vs kelvin, etc. Off to pick a fight! Link to comment Share on other sites More sharing options...
kerry davies Posted March 4, 2011 Share Posted March 4, 2011 1 Litre liquid = 1 kilo weight = 0.5 cubic metres gas = just under 0.23 cubic feets of solids. (Roughly!) Normally I wave things like the chart and say; "Can't you see, it's simple". Muttering and shaking of head seems to satisfy them well enough. Good luck with them, mate. Link to comment Share on other sites More sharing options...
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