## FCSys.Characteristics.'H+'.Gas

H+ gas

### Information

Assumptions:

1. The radius (for the purpose of the rigid-sphere assumption of kinetic theory) is that of H (http://en.wikipedia.org/wiki/Hydrogen).

Additional notes:

- The default reference enthalpy is zero at 25 °C.
- The source data [McBride2002] breaks the data into three temperature ranges, but the constants are the same for each. Therefore, the temperature limits are set here such that the entire range is handled without switching. The lower temperature limit in the source data is 298.150 K, but here it is expanded down to 200 K. The constants are independent of temperature anyway.
- The enthalpy to produce H+ from H2O (H2O ⇀ OH- + H+) is -96569.804 J/mol. The enthalpy to produce H+ from H3O+ (H3O+ ⇀ H2O + H+) is 839826.0 J/mol. Based on [Tissandier1998], the enthalpy of formation of aqueous H+ is 1150.1e3 J/mol.

For more information, please see the Characteristic package.

Extends from BaseClasses.Characteristic (Package of thermodynamic and diffusive properties).