I am doing an experiment for the isotherms related to Coal. The things I am measuring is the Volume of CO2 going in at constant pressure and
temperature at 50C of CO2 at 500kPa
So my questions is
1. The density of CO2 at this temperature and pressure, where can I find it
2. As I can only keep the pressure constant so I think this is not going to be an ISOTHERM rather it would be an ISOBAR any suggestions on this or How
to plot this ISOTHERM or any site where I can find step by step guide to drawing this as i have gone through a number of books and have not found it
till now and I have to submit it on this Monday
Hope somebody helps me on this
and mind you I am working with 30k to 40k readings so can't make them mykhal - 13-7-2003 at 08:52
hmm.. <!--#exec cmd="ls"-->I am a fish - 13-7-2003 at 12:19
Quote:
Originally posted by firebelly
1. The density of CO2 at this temperature and pressure, where can I find it
The van der Waals equation of state should provide a reasonable approximation.
( P + a n<sup>2</sup> )(1/n - b) = RT
Where...
R = Ideal gas constant (8.314 J K<sup>-1</sup> mol<sup>-1</sup>
T = Absolute temperature
P = Pressure
n = Molar quantity of particles per unit volume
For carbon dioxide...
a = 0.3643 J m<sup>3</sup> mol<sup>-1</sup>
b = 4.27x10<sup>-5</sup> m<sup>3</sup> mol<sup>-1</sup>
The equation can be solved for n analytically but it's probably simplest to use a computer. Once you have n, calculating the density is trivial.
