When I open the thermo.dat file, I saw there are some parameters for pressure after those for the principle temperatures. How are the pressure effect considered in GWB? I am using GWB to calculate the solution under a constant CO2 pressure of 102 atm, and at temperature of 95 deg C. Under this condition, CO2 is at supercritical phase. I am wondering how could I calculate the fugacity coefficient under this pressure?
Also, the equilibrium constant for other aqueous species will change under high pressure also, how would GWB consider this effect? thank you.