A 5 litre pressure vessel contains 200g of propane. Using the Peng Robinson EOS calculate the pressure in the vessel at 50oC. What state is the propane likely to be in?
100 g of propane is removed from the cylinder and is replaced with 100 g of ethane. Recalculate the pressure of the vessel at 50oC. Assume all binary interaction coefficients are zero.
Critical parameters and acentric values:
Ethane:
MW = 30.069
Pc = 707.79 psia
Tc = 32.27 oC
w = 0.0986
Propane:
MW = 44.096
Pc = 616.41 psia
Tc = 96.67 oC