نرم افزار CHO

CHO is a program which allows the user to derive molar volumes, fugacities and activities for H2O, CO2, CH4, H2 and CO and perform speciation calculations at fixed P, T and fO2 in the O-H and C-O-H systems. It uses the CORK equation of state (Holland & Powell 1991, CMP 109, 265-273) for all COH gases and additionally allows use of the Pitzer & Sterner equations (Pitzer & Sterner 1995, Int J Thermophys 16, 511-518) for H2O and CO2. For gas mixtures the program uses the Van Laar mixing model as outlined in Holland & Powell (2003, CMP 145, 492-501) but also allows this to be overridden in favour of ideal mixing.