# Chemical Reactions

Enabling the Chemical Reactions solver and specifying model options.

| Description | Type | Default
--- | --- | --- | ---
chemistry.solve | Specified name(s) of the chemical reactions types or None to disable the reactions solver. | String | None

The following inputs must be preceded by the “chemistry.” prefix

| Description | Type | Default
--- | --- | --- | ---
[reaction0].reaction | Chemical formula for the given reaction. The string given as input must not contain white spaces and the reaction direction has to be specified as ‘–>’ or ‘<–’. Chemical species phases must be defined as ‘(g)’ for the fluid phase or ‘(s)’ for the solid phase. | String | None

    chemistry.solve = my_reaction0 my_reaction1

    my_reaction0.reaction = Fe2O3(s)+CO(g)-->2.FeO(s)+CO2(g)
    my_reaction1.reaction = FeO(s)+0.25O2(g)-->0.5Fe2O3(s)