Blending geometry with numerical computation: Charts for the enthalpy, absolute entropy, and flow exergy of 12 gases at low pressures

This note contains a set of charts for the enthalpy change function Δh(T), the absolute entropy at atmospheric pressure s°(T), and the flow exergy at atmospheric pressure e°x(T) of 12 gases in the ideal-gas limit. The gases considered are CO, CO2, H, H2, H2O, N, N2, NO, NO2, O, O2 and OH. These charts and the ideal-gas model can be used to calculate the enthalpy h(T), absolute entropy s(T,P) and flow energy e x(T,P) of the same gases.