4.7. Equations of State and Mole-Mass Conversions

Table 4.6: Equations of State and Mole-Mass Conversions Subroutines^[a]

Subroutine	Description
`SUBROUTINE CKMMWC (C, ICKWRK, RCKWRK, WTM)`	Returns the mean molecular weight of the gas mixture given molar concentrations; see Equation 2–9 .
`SUBROUTINE CKMMWX (X, ICKWRK, RCKWRK, WTM)`	Returns the mean molecular weight of the gas mixture given mole fractions; see Equation 2–8 .
`SUBROUTINE CKMMWY (Y, ICKWRK, RCKWRK, WTM)`	Returns the mean molecular weight of the gas mixture given mass fractions; see Equation 2–7 .
`SUBROUTINE CKPC (T, C, ICKWRK, RCKWRK, P)`	Returns the pressure of the gas mixture given temperature(s) and molar concentrations; see Equation 2–5 .
`SUBROUTINE CKPX (RHO, T, X, ICKWRK, RCKWRK, P)`	Returns the pressure of the gas mixture given mass density, temperature(s) and mole fractions; see Equation 2–5 .
`SUBROUTINE CKPY (RHO, T, Y, ICKWRK, RCKWRK, P)`	Returns the pressure of the gas mixture given mass density, temperature(s) and mass fractions; see Equation 2–5 .
`SUBROUTINE CKRHOC (P, T, C, ICKWRK, RCKWRK, RHO)`	Returns the mass density of the gas mixture given pressure, temperature(s) and molar concentrations; see Equation 2–6 .
`SUBROUTINE CKRHOX (P, T, X, ICKWRK, RCKWRK, RHO)`	Returns the mass density of the gas mixture given pressure, temperature(s) and mole fractions; see Equation 2–6 .
`SUBROUTINE CKRHOY (P, T, Y, ICKWRK, RCKWRK, RHO)`	Returns the mass density of the gas mixture given pressure, temperature(s) and mass fractions; see Equation 2–6 .
`SUBROUTINE CKCTX (C, ICKWRK, RCKWRK, X)`	Returns the mole fractions given molar concentrations; see Equation 2–17 .
`SUBROUTINE CKCTY (C, ICKWRK, RCKWRK, Y)`	Returns the mass fractions given molar concentrations; see Equation 2–16 .
`SUBROUTINE CKXTCP (P, T, X, ICKWRK, RCKWRK, C)`	Returns the molar concentrations given pressure, temperature(s) and mole fractions; see Equation 2–14 .
`SUBROUTINE CKXTCR (RHO, T, X, ICKWRK, RCKWRK, C)`	Returns the molar concentrations given mass density, temperature(s), and mole fractions; see Equation 2–15 .
`SUBROUTINE CKXTY (X, ICKWRK, RCKWRK, Y)`	Returns the mass fractions given mole fractions; see Equation 2–13 .
`SUBROUTINE CKYTCP (P, T, Y, ICKWRK, RCKWRK, C)`	Returns the molar concentrations given pressure, temperature(s) and mass fractions; see Equation 2–11 .
`SUBROUTINE CKYTCR (RHO,T, Y, ICKWRK, RCKWRK, C)`	Returns the molar concentrations given mass density, temperature(s) sand mass fractions; see Equation 2–12 .
`SUBROUTINE CKYTX (Y, ICKWRK, RCKWRK, X)`	Returns the mole fractions given mass fractions; see Equation 2–10 .

^[a]Where appropriate, the description refers to an equation number in Chemkin Theory Manual .