Use TQSTSC to get the stoichiometry and molecular mass of a system component.
|Name||Type|| Value set on call or returned
|INDEXS||INTEGER|| Set to the index number for a component
|STOI|| Array of
| Returns the stoichiometry of the component
|WMASS||DOUBLE PRECISION|| Returns the molecular mass of the component
|NOERR||INTEGER|| Returns an error number
INDEXS is integer input. The array STOI needs to be declared large enough to hold at least as much DOUBLE PRECISION values as there are system components, see parameter NSCOM in TQNOSC. The component's full stoichiometry matrix is always returned through STOI, even if known from the component's index number. WMASS is the molecular mass of a component with index number INDEXS.
The contents of the array STOI are fairly trivial: The array is filled with zeros except for the element no. INDEXS, which has a value of 1.0. The reason for TQSTSC to return this array despite its redundant contents is to keep its calling syntax similar to that of TQSTPC. For more information on the stoichiometry matrix, see Appendix E.3.
Note that the value for the molecular mass is returned in the current amount unit per mol. Since the default amount unit is also mol (see Table 7), the result will always be 1.0, unless the amount unit is changed, for instance to gram.
TQNOSC, TQINSC, TQGNSC, TQCSC
|ChemApp Programmer's Manual, Edition 3.6||© GTT-Technologies, 2003|