makes use of enthlapy values
    that include the heat of formation (the default tables do not) and the enthalpy value
    chosen for the burner must reflect this. Example values for jet fuel include LHV
    equal to 18400 BTU/lbm (used with the default gas tables and does not include heat of formation) and
    enthlapy (used with Cantera generated gas tables and including heat of formation) equal to -1200 BTU/lbm. Note, negative numbers are okay,
    since the enthalpy is based on a reference zero value.
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