CSTR data. Liquid or gas phase

Data obtained In continuous stirred tank reactors have the merits of isothermicity and of an algebraic relation between the variables rather than a differential one. At steady state in a CSTR the material balance on a reactant A is 

In most liquid phase reactions the volumetric flow rates are nearly the same in and out, so 

The three constants k, a and 3 are found by multilinear regression with data of (Ca, t) of this arrangement of the material balance, 

For gas phase reaction with a change in the number of mols, the material balance is made in terms of molal flows, 

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