Hi Does anyone have a figure for this. I've trolled the net for nearly 2 hours now with no success. Any help or guidance much appreciated. Bitman
CRC handbook lists the density at various temperatures fordifferent pressures: At 1 atmosphere (gas) T (k) density(mol/L) 250 0.050 275 0.045 300 0.041 325 0.037 350 0.035 375 0.032 400 0.030 450 0.027 500 0.024 At 10 atmospheres (liquid) T (k) density(mol/L) 275 11.962 300 11.102
Also note that at 1 atmos and tempertures > 0C that mgb's figures agree with the ideal gas law with at most 2% error. So if you are working in this range then you don't need to look it up, you can calculate it. PV = NRT with N and P held constant. dV/V = dT/T or dV/dT = V/T
Hi I'm really interested in the liquid properties. I can do the gas stuff (mostly, when I get the sums right :-0 ). I'm interested in the change of density between 353k (448.9psi) and 293k(124.6 psi). I thought as it was a liquid it was incompressable thus the pressure didn't matter. If so it should have a fixed coefficient of expansion. Your figures, mgb_phys, at 10 atm seem to indicate -0.288% per degree C. So assuming the pressure change is inconsequential I'm looking at a reduction in liquid density of 17.28%. Thanks for the info and the time. Please protest if you think these conclusions are incorrect. Bitman
The handbook only gives 1Mpa and 10Mpa - you can interpolate the values you need. 1Mpa 275 = 11.962 300 = 11.102 325 - gas 10Mpa 325 = 10.860 350 = 9.973 375 = 8.905 293K/124.6psi looks very close to boiling point